Ladies Size 5 | Womens Size 5 UK Boat Shoes sizing information. Womens SIze 5 boat are equal to European size 38. For american sizes just add 2.5 to the UK size! We know sizes can be tricky when buying online and that is why we offer a 28 money back guarantee or replacement if your shoes aren't 100% perfect fit. All our footwear stock is held in central warehouse so we are able to offer a huge range of different sizing options depending on your requirements.