Narrow in the straps with no elastic for give. The lengthhowever was perfect I wear a 10. 22-23 cm long. Took pictures, but the review wont let me add them for some reason. These ones though have a bit wider "toe box" than other shoes Ive had which is great! Should have bought two! its a little dental floss line gap. They sealed well and have no leaks. its exact on his feet. as this one allows for both it worked perfect for me.