Suture size chart
More zeros means a thinner suture: 6-0 is much finer than 2-0. Gut sutures run about one size thicker than synthetics with the same label.
| USP size | Synthetic absorbable (mm) | Gut / collagen (mm) |
|---|---|---|
| 2 | 0.500–0.599 | 0.600–0.699 |
| 1 | 0.400–0.499 | 0.500–0.599 |
| 0 | 0.350–0.399 | 0.400–0.499 |
| 2-0 | 0.300–0.339 | 0.350–0.399 |
| 3-0 | 0.200–0.249 | 0.300–0.339 |
| 4-0 | 0.150–0.199 | 0.200–0.249 |
| 5-0 | 0.100–0.149 | 0.150–0.199 |
| 6-0 | 0.070–0.099 | 0.100–0.149 |
| 7-0 | 0.050–0.069 | 0.070–0.099 |
Diameter limits from USP 35. Check the current USP–NF for the latest limits.
Sources
Always check the package insert for the product you're using.