Tall Brown Costume Boots for Adults

For a 10.5 wide, the Size 11 is likely the better choice. Its footbed measures 11 1/4 inches heel to toe and the toe width is 4 inches, compared to the Size 10's 10 3/4 inch footbed and 3 3/4 inch toe width, so the 11 gives you that extra room a wide foot needs.
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These boots are sized by footbed length rather than a gendered sizing system, so the best way to find your fit is to match your foot length to our chart. A Size 8 has a 9 3/4" footbed, Size 9 is 10 1/2", Size 10 is 10 3/4", Size 11 is 11 1/4", and Size 12 is 11 3/4", so whoever is wearing them can find their size by measuring heel to toe and comparing.
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A UK size 10 converts to a US size 10 as well, so our Size 10 should be the right starting point, with a footbed of 10 3/4" heel to toe. Compare that measurement to your actual foot length to make sure it's a comfortable match.
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These boots are sized by shoe size rather than S/M/L/XL, so a size 12 is exactly what you'd order. The size 12 has an 11 3/4" footbed (heel to toe), a 15 1/4" boot height, and an 18 1/4" calf circumference, with an inside zipper to help you get them on and off.
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Hi Simon! UK men's sizes run about one size larger than US, so a UK 13 to 13.5 translates to roughly a US 12 to 13. Our Size 12 has a footbed of 11 3/4 inches and our Size 13 has a footbed of 12 inches, so Size 13 is likely your best match and should give you a little room to spare.
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