UK 10.5 in US shoe size
UK 10.5 is a US men's 11.5.
At adidas, a US men's 11.5 is labelled UK 11 / EU 46.
Brands vary. These conversions follow Nike's men's and women's footwear charts. Another label can run half a size (or a whole size) different, so if the store publishes its own chart, trust that first. All sources
Convert a different size
That exact size isn't on the men's or women's chart; showing the nearest listed size.
In adidas sizing the same US men's 11.5 is UK 11 / EU 46: adidas counts EU sizes in thirds.
Questions shoppers ask
What is UK 10.5 in US size?
UK 10.5 is a US men's 11.5, based on Nike's published footwear charts.
Will this size fit every brand?
Not always. Brands map their own lasts to size numbers, so the same foot can be half a size different between labels. Measure your foot length in centimetres and compare it with the store's chart when one is available.