Generous, wide toe box, no "toe cleavage" for those of you that may be concerned about that.  If you purchase your normal size and find they are too roomy, you can compensate with inserts and no-slip heel pads so that you don't "walk out" of the shoe.  In fact, if they don't have your normal size, you might be able to get away with a half size smaller and be OK, depending on how much tolerance you have for slightly tighter shoes; again, being slightly tighter keeps you from accidentally walking out of the shoe.