Sizes as written on the Havaianas:-
UK 4 = EU 39/40 = Brazil 35/36 Measure just under 9.5 inches 24.5cm
UK 5 = EU 39/40 = Brazil 37/38 Measure just under 10 inches 25.5cm
UK 6= EU41/42 = Brazil 39/40 Measure just under 10.5 inches 26.5cm
Please check your size carefully as buyer is responsible for return postage if these do not fit.
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Beijos Lucy xx