When trying a shoe on for the first time, it should be instantly comfortable. Not too tight, not too loose, and extremely cushiony and supportive. However, most shoes do need to be broken in, so you may find if you wear them for a long period of time when you first get them, they will cause some pain and/or blisters.
We recommend that when you get a new pair of shoes, wear them for only an hour or so every day for roughly two weeks to break them in. That way you won’t get any discomfort.