A rack with four close tiers holds more pairs but no boots at all.
This is one of the two or three things customers write to us about most, so it is worth setting out properly rather than burying it in a product page.
The practical version
Skirting, a switch plate or a door architrave takes two or three centimetres you did not plan for.
Wipe engineered wood dry rather than washing it, and wash new bed linen once before use so the finish softens.
What we can check for you
Before writing about a rack that does not fit, measure the alcove width and send that figure with the product link. We can compare it against the stated dimensions in one reply.
What we will not do
We do not confirm that a piece will suit a space or a device we cannot see, and we do not add a specification the supplier did not state. Where the honest answer is that we do not know, that is the answer you will get.