Boutique Pearl pineapple pearl strap sandals macaron green Size 7

Very comfy and cute !!! New without box Perfect for summer !! Explain a bit about the sizing When you pick US 5.5 ( bottom of the shoes is 35) When you pick US 6 ( bottom of the shoes is 36) When you pick US 6.5( bottom of shoes is 37) When you pick us 7 ( bottom of the shoes is 38) When you pick US 7.5 ( bottom of the shoes is 39) When you pick US 8.5 ( bottom of the shoes is 41)