The first thing seed-bead charts print — and the last thing new beaders believe — is that the bigger the number, the smaller the bead. A 15/0 is smaller than a 6/0. The explanation sits in the size's own notation: the slash-zero is called an aught, and the aught system counted how many beads of that size would sit side by side along an inch. Eleven beads strung to the inch is an 11/0. Twenty-four of them, nearly sand-grain small, is 24/0. More beads per inch, smaller beads — the counterintuitive scale is a ruler in disguise.
Modern beadwork lives between 6/0 and 15/0. The bead shop tables run the same way ours does — the app's gram table and the shop charts agree:
| aught | about | spoken | where you meet it |
|---|---|---|---|
| 6/0 | 4.0 mm | "six aught" | chunky strands, spacers, kandi edges |
| 8/0 | 3.0 mm | "eight aught" | the friendly size for first peyote |
| 11/0 | about 2.1 mm | "eleven aught" | the workhorse — most charts, most patterns |
| 15/0 | about 1.5 mm | "fifteen aught" | fine detail, tight curves, heirloom density |
Say it as "eight aught" or just "size eight" — the notation varies (8/0, 8°), the count doesn't.
Round seed beads — rocailles — carry the sizes above. Cylinder beads (Miyuki's Delicas are the famous line) share the size run — 15/0, 11/0, 10/0 and 8/0 — with straight walls and larger holes, which changes the gram math: Delica 11/0 run about 200 beads to the gram against Miyuki's round 11/0 at about 110. Same number on the tube, two different materials, two different answers — the reason the gram table splits the families instead of averaging them.
The run doesn't stop at 15/0 in the references: sizes to 24/0 exist in the record — smaller than 1 mm, sand-grain territory. They haven't been manufactured since the 1890s. Any 16/0 or finer living in a stash today is an antique in the strict sense, with the care and the price that implies. The modern craft's floor is 15/0; the references floor is a century of history below it.
Pick the size the pattern names, weigh what the chart counts, and string something this week. — the bench crew
