Use I with cell phone. My only real gripe about these is that when walking in the woods, the openness of a sandal allows grass, pebbles, and debris to get into your sandal. Regarding sizing, I wear a US 5, or a UK 3, or an EU 35 and my feet measure 22. Received earlier than expected even tho package was delivered to the wrong person. There isn?t any foam or padding, but the materials used (plastic? rubber?) is actually comfortable. I went a size up as per reviews recommended and Im glad I did. It also looks very nice, not cheap like other shoe racks. There are some rude bits with references to masturbation and sex so dont just show it to visiting kids without checking with parents, some people would be offended. Two different sizes of screws in one bag and both marked "D". They dont have the amount of material to hold up as well as my Keens - however they look much more like a conventional sandal - and honestly my Keens have not been holding up more than a season.