Seed Beads 101: A Jewelry-Maker's Guide to Seed Beads

Seed Bead Sizes

Seed beads are classified by a number that relates to their size: 6/0, 8/0, 11/0, 12/0, 13/0 and 15/0. The biggest key to understanding seed bead sizing is the concept that the smaller the number, the larger the bead. This means a 6/0 seed bead is larger in size than a 12/0 seed bead. The 0 used in the measurement is pronounced "aught" and can be denoted by a slash, followed by a zero or a degree mark or preceded by a number sign (#). For example, size 11 can be written 11/0, 11° or #11, and is referred as "size 11" or "11 aught" seed beads.

This sizing number is historically based on the idea that bead manufacturers would refer to their standard-sized beads in the largest quantities as size 0 or null. Smaller size beads such as 10/0 were therefore beads that were 10 times smaller than the size 0 or null bead.

The size measurement also correlates with the number of beads that will fit into an inch when the beads are lined up side by side (with the holes parallel to each other). For instance, size 8/0 would equal eight beads to one inch. 

View Fire Mountain Gems and Beads' FREE printable "Seed Bead Sizes and Hole Sizes" conversion chart to find the approximate diameter of the different seed bead sizes available. Keep in mind that the length of seed beads will vary depending on the shape, brand and due to different manufacturing processes, coatings and finishes. This chart also includes approximate bead hole sizes and recommended wire gauge sizes for jewelry-making projects.

Bugle Beads - long, skinny tubular-shaped beads available in twisted, straight and hex-cut varieties. Great for use in ladder stitch, fringe and stringing designs.

Cube or square beads - small square beads. These tiny cubes add interesting dimensions and texture when mixed with round beads.

Czech glass seed beads – rounded, donut-shaped beads. Master glass artisans have been making beads like these since the 15th century, including well-known Preciosa Ornela glass seed beads. These beads are not only for modern high-fashion and everyday pieces but also for traditional styles, historical re-creations and restorations. Size and shape may vary slightly and color may vary from dye lot to dye lot. See more details in the Czech seed beads spotlight.

Delica® - high-quality cylinder-shaped seed beads by Miyuki of Japan, perfect for precision loom and off-loom work. Available in sizes 8/0 and 10/0, and most commonly in 11/0. See more in the Delica seed beads spotlight.

Dyna-Mites™ - Fire Mountain Gems and Beads' brand of seed beads made by Matsuno® of Japan. Excellent for loom work and available in a wide range of colors. Available in 11/0, 8/0, 6/0 and bugle beads. See more details in the Dyna-Mites seed beads spotlight.

Hex 2-cut Beads or Hexagon Beads - a six-sided bead with regular facets that looks like a hexagon when viewed from the end. Also referred to as "two-cuts."

Matsuno - a Japanese bead manufacturer.

Ming Tree™ - Fire Mountain Gems and Beads' brand of economical seed beads. Their more organic rounded shape makes them perfect for fringe, jewelry and embellishing clothing and craft applications.

Miyuki - a Japanese bead manufacturer of seed and cylinder beads, including but not limited to the Delica brand. Their beads are considered very high quality.

Rocaille - a term used for the traditional seed bead shape. These are donut-shaped and slightly oval; the ends are rounded. Available in many sizes and brands and can be used in weaves both on- and off-loom, depending on the uniformity of the specific beads.

Toho Beads® - precision-quality glass seed beads from Japan loved for use in bead weaving, looming and peyote stitch. Available in 11/0 and bugle beads.

Triangle seed beads - triangle-shaped beads with triangular holes ensuring the beads sit correctly in a design.

Candy™ beads - tantalizing round beads by Preciosa with a flat profile, two holes, a domed top and shallow curvature at the base. Fun and easy to sew with, make clusters or combine with other Preciosa pressed glass shapes such as Twin™ and Pellet™.

DiamonDuo - Czech two-hole beads with a classic diamond shape and faceted front. The two stringing holes positioned on each elongated diamond point offer plenty of design possibilities such as bead weaving, stringing projects and more.

Fringe seed beads - also known as "teardrops" or "drop beads." They are available from both Czech and Japanese manufacturers. Popular shapes include Magatama and Pip beads.

Magatama - from Miyuki of Japan, the long magatama is an angular drop-like bead used as a fringe bead. When used in kumihimo braiding, these beads form a dramatic scale-like effect.

Pip - Czech top-drilled or fringe style flat wide beads ideal for creating flower shapes.

Pony beads - also known as crow beads, are large-sized seed beads often made of acrylic. Multiple manufacturers. Glass crow beads are also available.

Pressed Twin™ - Czech two-hole beads, also available in Mini Twin version. The small oval shape has a slight indentation that allows the Pressed Twin to nest with other beads such as seed beads or the Preciosa Pip™.

Thorn™ - long, tapered, pressed glass beads by Preciosa, imported from the Czech Republic. Ideal for adding a dramatic spikey texture.

Tila® Beads - Japanese square flat beads with two holes running parallel. Also available in Half Tila and Quarter Tila, narrow rectangular versions of the Tila bead. Great for creating tile and mosaic patterns.

As with any applied coating or finish, there is always the possibility of fading through long exposure to sunlight, or through day-to-day wear and use. Learn more about the color and treatment durability of seed beads with Fire Mountain Gems and Beads' printable "Seed Bead Finishes and Treatment Durability" chart and "Delica® Color Durability Chart".

Seed Bead Spotlights

• Preciosa Czech Seed Beads - Glass Seed Beads by Preciosa
  Czech seed beads by Preciosa have always been considered the "gold standard" of seed beads. Bead making has long been a way of life for the people of the Czech Republic, especially in the Jablonec region. Known in the Middle Ages as Bohemia, this area has been the largest European bead center for hundreds of years, with techniques being handed down through the generations.
• Bead Shape:
  Czech seed beads are a rounded, almost donut-shaped bead, some with square holes, others with round holes, depending on how they are made and whether they have a coloring or metallic lining on the inside of the bead hole.
• Colors Available:
  Czech seed beads by Preciosa are available in a tantalizing variety of colors and treatments, including some colors that closely mimic the "old colors" which are only found in genuine antique beads. The reds are especially rich and lovely due to the pure gold added while the glass is molten. Not only does the gold make the reds and pinks more brilliant, but it also stabilizes the color and prevents it from fading. The rainbow colors are subtle yet glowing, and the selection of "pearl" shades is impressive.
• Beading Applications: Czech seed beads can be used in any type of beadwork. However, they are most often found in bead embroidery, especially in Native American regalia-making. Because of the round shape, they are also used extensively in jewelry making—they mimic larger beads and add lovely glints of color to necklaces or bracelets when used as spacers. Czech seed beads can also be used in loom weaving and in bead weaving, but can cause problems with stitch tension because of their rounded edges. If you wish to use these beads in bead weaving and have not done so before, try a matte-finished bead. Matte-finished beads tend to grip the thread well, making it easier to maintain proper tension.
• Shop all Preciosa Czech seed beads here.

• Delica® Seed Beads - Glass Seed Beads by Miyuki Shoji of Japan: Delica beads have long been the most popular seed beads for bead weaving because of their precise size, shape and consistent hole size.
• Bead Shape: Delica beads were the first to be manufactured using a special process that creates regular, cylindrical shaped beads—which is very different from the manufacturing process of the traditional "donut" or standard seed bead shape. Delicas are available in two shapes: round (circular cut, which is cylindrical in shape) and hex-cut. Hex-cut beads are machine cut to form a six-sided exterior; the hole remains smooth and round. Both shapes are available in what is called size 11/0, which is slightly smaller than an 11/0 Dyna-Mite™ seed bead—between an 11/0 and a 12/0 size. This is the only size seed bead that is called Delica.
• Colors Available: Delica beads are made in every color of the rainbow and every color in between. Delicas have different glass and surface treatments added to enhance colors, causing them to recede, glow or soften, according to type or project. Enhancements include: transparent, opaque, color- or silver-lined, frosted, pearl finish, silky luster, metallic, gold-lined and even precious metal plated. Delicas also have different finishes added to the top of all the enhancements mentioned above. The finishes include: matte, a non-reflective finish; iris, resembling colors of oil upon water; aurora borealis, reflections of a transparent rainbow superimposed over the base color; and satin, a soft color etched gently to a matte finish.
  
• Beading Applications: Delica beads are ideally suited to linked bead-weaving stitches, such as peyote or brick-stitch. They are also excellent for loom weaving, since they stack against one another so well in the weaving process and do not slip.
• Shop all Delica® seed beads here
• Dyna-Mites™ Seed Beads - Glass Seed Beads by Matsuno of Japan: Dyna-Mites seed beads are wonderfully consistent in shape and color as compared to the standard-shaped seed beads on the market today
• Bead Shape: Dyna-Mites seed beads, made in Japan exclusively for Fire Mountain Gems and Beads, are best described as a cross between the shape of a Delica bead and a regular, donut-shaped (Czech) seed bead.
• Colors Available: Dyna-Mites seed beads come in a wide range of rich colors with beautiful color saturation and clarity. Dyna-Mite™ seed beads are available in many different finishes: ceylon pastels, silver lined, opaque, transparent color, transparent inside color and transparent inside rainbow colors. Many of the above are also available with a matte finish.
• Beading Applications: Dyna-Mites seed beads are perfect for just about any seed bead application, such as peyote, brick-stitch, loom weaving, netting, right-angle weave and jewelry-making applications, such as being used as spacers. Dyna-Mites seed beads are economical and tough, holding up to tight tension in netting, bead weaving and other applications, even to multiple passes of thread through the beads. They are excellent beads and are perfect to stock up on, especially if you are beading on a budget.
• Shop all Dyna-Mites seed beads here
• Toho Beads® Seed Beads - Glass beads by Toho Beads® of Japan: This highly customer-requested brand of seed beads is well-known and loved for consistency in shape and color. Toho Beads began in 1951 and has grown to be a giant of the glass bead-making industry in Japan, largely due to their innovations in manufacturing techniques and dedication to quality.
• Bead Shape: Toho seed beads are mostly available in traditional #11 round. The available stringing hole shapes are round, triangle, square or diamond. These seed beads from Toho were designed to have a slightly larger stringing hole that allows for more passes of your needle and thread. Another advantage of a larger hole is that each bead weighs just slightly less.
• Colors Available: Toho glass beads are consistently colored, ensuring designer-artists have access to the same colors for adding to or re-creating beaded designs. The myriad of colors are available in a range of finishes: opaque, transparent, translucent with galvanized, metallic and other effects to offer a large variety.
• Beading Applications: Due to the level of precision, Toho seed beads are favorites for use in bead weaving, looming, peyote stitch and basic stringing techniques. Toho also makes its own nylon thread to use with their seed beads. One-G™ 100% nylon thread is specially made to be stronger and more shred-resistant than other nylon jewelry-making threads.
• Shop all Toho Beads seed beads here
• Ming Tree® Seed Beads - Glass Seed Beads: Ming Tree seed beads, exclusive to Fire Mountain Gems and Beads, are a great economic value allowing you to design at half the cost of other seed beads.
• Bead Shape: Ming Tree seed beads are mostly sold in packages of ¼ pound, containing approximately 10,500 beads, and one-pound packages of approximately 42,500 beads. These round-hole beads are available in round and bugle beads.
• Colors Available: The Ming Tree seed bead line includes many different colors and finishes for matching any jewelry project.
• Beading Applications: These glass seed beads are great for fringe on clothing, jewelry and great as spacers.
• Shop all Ming Tree seed beads here
  

• TILA® Seed Beads - Glass Seed Beads by Miyuki: TILA beads are flat, two-holed glass square beads. Combine TILA beads with other seed beads to create one-of-a-kind designs and patterns. Using a variety of stitching techniques, TILA beads can create intricate tile patterns and geometric designs.
• Bead Shape: Miyuki TILA beads are flat square or rectangular tile-shaped 2-hole seed beads that are available in 3 different sizes: TILA (5 x 5 x 1.9mm), Half-TILA (5 x 2.3 x 1.9mm) and Quarter-TILA (5 x 1.2 x 1.9mm) for all your design needs.
• Colors Available: TILA beads by Miyuki are available in a wide range of colors.
  
• Beading Applications: TILA beads can be used alone or in combination with other seed beads to connect multiple strands in bead weaving.
• Shop all Miyuki TILA seed beads here

Find more information on seed bead sizing, finishes, shapes and more, all in one place, including FREE printable seed bead resources and charts for quick and easy reference and hassle-free product ordering.