Fin size guides for both the Fourth Element Rec Fin and the Tech Fin. The sizes are provided by Fourth Element and we have found them to be accurate. Please remember to factor in the size of drysuit boot or wetsuit boot.
Fourth Element Rec Fins Size Guide
| Fin Size | Shoe Size (For guidance) | Foot Pocket Width | Foot Pocket Height | Blade Length | Fin Weight |
| Small | UK 4-6.5 | 9cm | 8cm | 37cm | 1.7kg |
| Regular | UK 7-9 | 9cm | 9cm | 38.5cm | 2kg |
| X-Large | UK 9.5-12 | 9cm | 10cm | 40cm | 2.4kg |
Fourth Element Tech Fins Size Guide
| Fin Size | Shoe Size (For guidance) | Foot Pocket Width | Foot Pocket Height | Fin Weight |
| Small | UK 4-7 | 10cm | 7.5cm | 1.7kg |
| Regular | UK 8-10 | 11cm | 8cm | 2.5kg |
| X-Large | UK 10-12 | 11.5cm | 8.5cm | 3kg |
| XX-Large | UK 12-14 | 12cm | 9cm | 3.5kg |