Sizing questions come up in my inbox every week, and a lot of them come down to one thing: the boot is in UK or EU sizing, and the customer shops in US sizes. Here's how I handle it.
UK sizing (Viberg, Tricker's)
Brands like Viberg and Tricker's use UK sizing, which runs about a size different from US sizing. In my Viberg Service Boot review, a US 10 lined up with a UK 9 (EU 43).
The last matters too. Viberg's 2020 last is narrow, and the 2030 last gives more room. And some models run differently again: the Viberg Slides I have in the shop are marked 7.5 but fit like a US 8.5, because Viberg recommends sizing down 1.5 sizes on that last. I wrote more about it in this post.
Ordering insoles for UK-sized boots
My insoles are in US sizes. For UK-sized boots, size up a half. For example, for a UK 9 boot, order the US 9.5. Every listing also shows the exact length and width in inches next to a ruler, so you can compare against your boot's footbed.
- Thin (5 oz): takes up about a half size
- Medium (10 oz): the standard, most popular thickness
- Thick (15 oz): only for boots a full size to a size and a half too big
EU sizes
My insoles used to be sold in EU sizes, which ran small, so I switched to US boot sizes. If you bought from me before, here's how the old sizes line up:
- 40 = US 7
- 42 = US 8
- 43 = US 8.5
- 44 = US 9
- 45 = US 9.5
- 46 = US 10
- 47 = US 10.5
- 48 = US 11
- 49 = US 12
- 50 = US 13
Half sizes and wide boots
For a US half size like 11.5, size down to the nearest whole size (the 11), then check the inch measurements. The insoles are a standard D width: they'll match the length of a wide boot but won't fill the full width. For very wide or unusual boots, I can make custom insoles ($50, and you may need to send me your originals).
For brand-by-brand advice, see my insole sizing guide. Still not sure? Send me your boot brand and size through the chat and I'll help you pick. Shop insoles.
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