I’m buying running shoes online and the only one they have available is for 8.9 inches while mine foot is about 8.7 (8.66)inches. My old under armours were around size 3 or 4 and they are getting really tight and short for me. these new ones are around size 6 and seem like good shoes for the price. So is it okay for that much of a difference or should I just find a different pair?