Does it run big or small?

Fit depth guide

Sorel Caribou winter boots are commonly described as roomy — many people size down half a size from sneakers when wearing normal socks, while thick winter sock systems push back toward TTS. The removable felt liner compresses and is part of the fit equation; trying the boot with the liner you will actually use matters.

Width is generally generous for cold-weather footwear. Narrow feet may need an aftermarket insole for lockdown rather than jumping down two sizes.

Break-in is liner pack-out and slight upper softening. Waterproof shells do not stretch like fashion leather; length mistakes are harder to “wear out.”

Versus other Sorel or UGG: different lasts — Caribou’s insulated volume is its own problem. Do not assume UGG TTS maps perfectly.

Sizing tips: decide sock thickness first. Between sizes for deep cold with liner + thick socks, lean larger; for milder use with thin socks, half down is a common try. Ensure toes are not jammed against the front when fully flexed walking.