I wear size 11 Regular. The toe box is "wider" than a regular toe box for a size 11 Regular shoe, but the arch and heel are a regular width for a size 11 Regular shoe. If you wear an 11 Wide, then your shoe may feel narrower mid-foot, especially in the arch. If you have worn any shoes by Altra (which feature zero-drop in addition to a wider toe box for an otherwise standard/Regular fit), then you will know what to expect with these shoes, except that the Viktos shoes have a mild heel-toe drop. I do not know if Viktos makes a Wide version of their PTFX Core shoes, but it seems reasonable that, if they do, then their shoes will be proportionately wider than their Regular shoe width. I hope this input helps.