These are the size comparisons given by Ceyo.
Ceyo Adult Flip Flop 6100-11 sizes 40-45 (6 ½ - 10 ½ UK)
NWT - Crocs Unisex-Adult Flip-Flop - Black - M10
JiaYouLC Unisex Flip Flops Rubber Flatform Beach flipflops Slip-Resistant Flat Flip-Flop for Shower Swimming Pools (Black-A, Adult, Men, 4, Numeric Range, UK Footwear Size System, 5, Medium)
Havaianas Brasil Mix Unisex Adult Flip Flops | Top Mix, Flip Flop, Steel Grey/White, 7.5/8 UK
JiaYouLC Unisex Flip Flops Rubber Flatform Beach flipflops Slip-Resistant Flat Flip-Flop for Shower Swimming Pools (Black-A, Adult, Men, 8, Numeric Range, UK Footwear Size System, 9, Medium)
JiaYouLC Unisex Flip Flops Rubber Flatform Beach flipflops Slip-Resistant Flat Flip-Flop for Shower Swimming Pools (Black123, Adult, Men, 6, Numeric Range, UK Footwear Size System, 7, Medium)
