Lightweight Non-Slip Summer Thongs Flip-Flops Canvas Y-strapQuality thongs flip flops best summer yet. High quality: Cross tied durable upper with canvas no blisters Y strap (toe thong). Measure your foot length while standing: from the tip of your big toe to the back of your heel. If your size falls between two sizes, order the larger size. Order one size larger also if your foot is thick or wide. EU Size Australia US Size Heel to toe (cm) 40 7 24. 5 to 25 41 8 25 to 25. 5 42 8. 5 25. 5 to 26 43 9. 5 26 to