The 105 SPD-SL type pedals are big enough for me personally to ride on in regular shoes, but to be honest, I almost never do that. And I don't walk around much in my road shoes, so I've basically put SPD-SL pedals on most of my road bikes. I do have an old campus bike with the dual platform PD-A530 pedals (one side SPD, one side small platform), but the platform side isn't necessarily all that great either IMHO. It's fine for short jaunts to the market or cafe I guess, but I prefer being clipped in for everything else.