Harry PotterOnesie For Women, Adult Fleece Hooded Onesies S-XL, Unisex Gifts

I’m a 14-16 and 5ft 6ins what size should I buy

I am 5ft 1 and a size 12 normally what size would fit me?

Is body length the same as height. Because the listed dimensions seem very short

I am trying to order a size 16/18 (large) harry potter onesie the only size on screen is s and i cannot change it to get the size i want