Sierra Says: Get out there and shred. Nothing can stop you now that you have the Prion boot from Thirty-Two. This easy flexing boot keeps you going all day with out the muscle burn and with technical features that keep the blood flowing and your toes warm. Do not buy things you do not need, and the Prion is here just for that reason.
32 Says: Featuring high-performance, high value and high comfort, the Prion is perfect for first-timers or the seasoned professional. It’s built to ride all day long.
- 3-D Molded Tongue
- Internal Lacing w/ Custom Lace Lock
- Level 1 Liner
- Anatomical Heel Retention System
- Level F Footbed
- Outsole w/ Aggressive Tread for Grip
- Flex: 4 / 10
Printable Mens US Foot Measuring Guide
Printable Womens US Foot Measuring Guide
| Mens Boots Size Conversion | Womens Boot Size Chart |
| US Sizes | Euro Sizes | UK Sizes | Inches | CM | US Sizes | Euro Sizes | UK Sizes | Inches | CM |
| 6 | 39 | 5.5 | 9.25" | 23.5 | 4 | 35 | 2 | 8.1875" | 20.8 |
| 6.5 | 39 | 6 | 9.5" | 24.1 | 4.5 | 35 | 2.5 | 8.375" | 21.3 |
| 7 | 40 | 6.5 | 9.625" | 24.4 | 5 | 35-36 | 3 | 8.5" | 21.6 |
| 7.5 | 40-41 | 7 | 9.75" | 24.8 | 5.5 | 36 | 3.5 | 8.75" | 22.2 |
| 8 | 41 | 7.5 | 9.9375" | 25.4 | 6 | 36-37 | 4 | 8.875" | 22.5 |
| 8.5 | 41-42 | 8 | 10.125" | 25.7 | 6.5 | 37 | 4.5 | 9.0625" | 23 |
| 9 | 42 | 8.5 | 10.25" | 26 | 7 | 37-38 | 5 | 9.25" | 23.5 |
| 9.5 | 42-43 | 9 | 10.4375" | 26.7 | 7.5 | 38 | 5.5 | 9.375" | 23.8 |
| 10 | 43 | 9.5 | 10.5625" | 27 | 8 | 38-39 | 6 | 9.5" | 24.1 |
| 10.5 | 43-44 | 10 | 10.75" | 27.3 | 8.5 | 39 | 6.5 | 9.6875" | 24.6 |
| 11 | 44 | 10.5 | 10.9375" | 27.9 | 9 | 39-40 | 7 | 9.875" | 25.1 |
| 11.5 | 44-45 | 11 | 11.125" | 28.3 | 9.5 | 40 | 7.5 | 10" | 25.4 |
| 12 | 45 | 11.5 | 11.25" | 28.6 | 10 | 40-41 | 8 | 10.1875" | 25.9 |
| 13 | 46 | 12.5 | 11.5625" | 29.4 | 10.5 | 41 | 8.5 | 10.3125" | 26.2 |
| 14 | 47 | 13.5 | 11.875" | 30.2 | 11 | 41-42 | 9 | 10.5" | 26.7 |
| 15 | 48 | 14.5 | 12.1875" | 31 | 11.5 | 42 | 9.5 | 10.6875" | 27.1 |
| 16 | 49 | 15.5 | 12.5" | 31.8 | 12 | 42-43 | 10 | 10.875" | 27.6 |
| Youth Boot Size Conversion | Kids Boot Size Conversion |
| US Sizes | Euro Sizes | UK Sizes | Inches | CM | US Sizes | Euro Sizes | UK Sizes | Inches | CM |
| 12.5 | 30 | 11.5 | 7.25" | 18.4 | 5.5 | 21 | 4.5 | 5" | 12.7 |
| 13 | 31 | 12 | 7.5" | 19.1 | 6 | 22 | 5 | 5.125" | 13 |
| 13.5 | 31 | 12.5 | 7.625" | 19.4 | 6.5 | 22 | 5.5 | 5.25" | 13.3 |
| 1 | 32 | 13 | 7.75" | 19.7 | 7 | 23 | 6 | 5.5" | 14 |
| 1.5 | 33 | 14 | 8" | 20.3 | 7.5 | 23 | 6.5 | 5.625" | 14.3 |
| 2 | 33 | 1 | 8.125" | 20.6 | 8 | 24 | 7 | 5.75" | 14.6 |
| 2.5 | 34 | 1.5 | 8.25" | 21 | 8.5 | 25 | 7.5 | 6" | 15.2 |
| 3 | 34 | 2 | 8.5" | 21.6 | 9 | 25 | 8 | 6.125" | 15.6 |
| 3.5 | 35 | 2.5 | 8.625" | 21.9 | 9.5 | 26 | 8.5 | 6.25" | 15.9 |
| 4 | 36 | 3 | 8.75" | 22.2 | 10 | 27 | 9 | 6.5" | 16.5 |
| 4.5 | 36 | 3.5 | 9" | 22.9 | 10.5 | 27 | 9.5 | 6.625" | 16.8 |
| 5 | 37 | 4 | 9.125" | 23.2 | 11 | 28 | 10 | 6.75" | 17.1 |
| 5.5 | 37 | 4.5 | 9.25" | 23.5 | 11.5 | 29 | 10.5 | 7" | 17.8 |
| 6 | 38 | 5 | 9.5" | 24.1 | 12 | 30 | 11 | 7.125" | 18.1 |
| 6.5 | 38 | 5.5 | 9.625" | 24.4 | | | | | |
| 7 | 39 | 6 | 9.75" | | | | | | |
| Please note that European size conversions vary by country and manufacturer. Because the foot is three-dimensional, any two-dimensional measuring tool, such as a ruler or Brannock device, can only approximate your true shoe size. Please also keep in mind that manufacturers use different lasts to construct their shoes, and sizing may vary accordingly. |
Continental US: Free Shipping on orders over $50.00, PO Boxes Excluded
Orders to: PO Boxes, APOs, Hawaii, Alaska and Orders Under $50.00,
Shipping rates will be calculated at the shopping cart.
International Orders: Please refer to the International Shipping Page