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Decoding Seed Bead Sizes for Jewelry Making

When working with seed beads for jewelry and craft projects, understanding the size chart is key. Seed beads come in a range of tiny sizes measured in millimeters. Learning the numbers and diameters helps you select the perfect beads for your designs. Let’s unlock the meaning behind seed bead sizes!

seed bead size chart

Seed Bead Size Measurements

Seed beads are sized using a numbering system that corresponds to millimeter measurements. The numbers represent the approximate diameter of the tiny holes that run through the beads.

  • Higher numbers indicate larger bead holes and overall bead sizes.
  • Lower numbers represent smaller beads and hole diameters.

Here is an overview of common seed bead sizes:

  • Size 12 – 1.5mm diameter
  • Size 13 – 1.8mm diameter
  • Size 15 – 2.0mm diameter
  • Size 16 – 2.3mm diameter
  • Size 18 – 2.5mm diameter

Sizes range from a petite 12 to a substantial 18. Japanese and Czech seed bead size charts follow this same numbering convention.

seed bead size chart
seed bead size chart

Picking the Right Seed Bead Sizes

Choosing seed bead sizes depends on the technique and desired design. Follow these tips:

  • Size 12-15 work well for delicate stringing and loomwork details.
  • Size 15 is versatile for most seed bead techniques.
  • Size 16 adds boldness for loomwork patterns or chunky stringing.
  • Size 18 makes statement pieces with substantial texture.
  • For a uniform look, stick to one size.
  • Mix sizes for an organic, textured style.
  • Pair smaller beads as accents to larger beads.

Seed Bead Size Reference

Use this handy chart as a reference when buying seed beads:

  • 12 = 1.5mm
  • 13 = 1.8mm
  • 15 = 2mm
  • 16 = 2.3mm
  • 18 = 2.5mm

Getting Creative with Seed Beads

Armed with seed bead size knowledge, you can make anything sparkle! Have fun experimenting with different sizes and combinations in your beaded creations.

seed bead size chart

FAQs about Seed Bead Size Chart

What are the sizes of seed beads?

Seed beads are classified by a number that relates to their size, such as 6/0, 8/0, 11/0, 12/0, 13/0 and 15/0.

How do you measure the size of seed beads?

Very briefly Seed Beads are measured in terms of the number of beads that can fit in a given length, with that length usually being an inch. This is referred to as the aught size and is usually written as a number/0 or number/º.

What is a size 11 seed bead in mm?

1.8mm

How many mm is size 10 seed beads?

Czech seed beads in size 10/0 (approximately 2.3mm) are available in a number of different color categories below. The hole diameter is approximately . 75mm.

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