Seed Bead Size Converter
Convert seed bead sizes such as 15/0, 11/0, 8/0, and 6/0 into millimeters, inches, beads per inch, and approximate bracelet bead counts.
Convert a seed bead size
Choose the size printed on a pattern or bead tube, or enter a millimeter measurement to find the closest common seed bead size.
Size 11/0 seed beads are commonly around 2.1 mm across, about 0.083 inches, or roughly 12 beads per inch.
How to use seed bead conversions
- Use the bead size from your pattern or tube label when you have it.
- Use the millimeter option when you measured a bead or found a product listing in mm.
- For bracelets and necklaces, treat bead counts as estimates and allow room for knots, clasps, spacers, and stretch.
- When matching a pattern, buy from the same brand or make a small test strip because bead shape and finish can change the finished size.
Quick seed bead size chart
| Seed bead | Approx. mm | Approx. inches | Beads/in |
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Seed bead conversion FAQ
Are seed bead size conversions exact?
No. Seed bead sizes are approximate because manufacturers, coatings, shapes, and finishes vary. Use the converter for planning, then test with your actual beads for fitted jewelry or detailed beadwork.
What size seed bead is 3 mm?
A 3 mm seed bead is usually closest to size 8/0. It is larger than an 11/0 bead and smaller than many 6/0 beads.
How many 11/0 beads fit in one inch?
Using a common 2.1 mm estimate, about 12 size 11/0 seed beads fit in one inch when lined up edge to edge. Real counts can shift with bead shape and tension.