Made for all-day, on-the-job comfort. Roomy by design like our original clogs, the Mercy Work offers generous room all around the foot. It has Crocs Lock™ tread for slip-resistance, heel-hugging backstrap, and a closed heel. Mercy Work Details: Roomy fit, like our original clogs, for maximum comfort Designed for work environments—laboratories, school, medical facilities, and more Crocs Lock™ slip-resistant tread Tiny nubs along the foot bed provide a massage-like feel Enhanced arch support and footbed Heel strap for increased support and performance Easy to clean and odor-resistant CE Certified Size Guide: Sold as the US size marked on sole of the crocs. US Size UK Size EU Sizes Inches Millimeters M4 | W6 M3 | W4 36-37 8 5/8 221 M5 | W7 M4 | W5 37-38 9 229 M6 | W8 M5 | W6 38-39 9 3/8 238 M7 | W9 M6 | W7 39-40 9 5/8 246 M8 | W10 M7 | W8 41-42 10 255 M9 | W11 M8 | W9 42-43 10 3/8 263 M10 | W12 M9 | W10 43-44 10 7/8 272 11 10 45-46 11 280 12 11 46-47 11 3/8 288 13 12 48-49 11 5/8 297 14 13 49-50 12 305 15 14 50-51 12 3/8 314