This item's sizing: W7 = EU 38 || W8 = EU 39 || W9 = EU 40/41 || W10 = EU 42 [ Please check photos for additional measurements from this brand ] The FSC®-certified Original Wellington boot was crafted using natural rubber from forests independently audited to Forest Stewardship Council® standards. These 100% waterproof boots are handcrafted to strict standards to protect forests, as well as the animals and communities that depend on them.