These boots are just as they appear online. The fit seems to be true to size, or perhaps they are cut just a tad small. None-the-less, on the norm I wear a size 9 to 9.5 [depending on the cut of shoe/boot].
I ordered a ten in these just in case, glad I did. For example, wearing a regular cotton crew sock, they are just right. NOW, as for the removeable insert? I DO recommend removing it and replacing with a softer or gel insert...OR simply use a thin* insert and place it over top of the existing one - which is a faux fur.
Reason for Recommendation?  After being in them a few hours, shopping, etc., when I returned home, my feet were not pleased. These are not too unlike the UGG, rather hard foot bed...almost lumpy.
So, in a nutshell, I would say this Cushe boot is true to size, has a roomy opening [*these are a slip on boot], roomy "foot area" [I have a long narrow foot, so these are probably ideal for someone with a medium width foot*], stylish for sure, toasty warm AND waterproof.
Enjoy!

Happy Holidays & happy shopping too!

**Footnote** This description/opinion is only of this particular Cushe boot. It is not intended for all Cushe footwear
Thank you