I have very wide Feet and found that I need to buy between size 11-12. It came too late (after my minimony). This results in an irreversible bump all along the mousepad - it is not flat on the desk. Im testing now with black background and no functions but phone and text. By comparison the DT770 are slightly slower in the highs yet have a very very prominent sibilance spike - making the high freq response wavy, not settled; the DT1990 dont have the sibilance issue - so do win out. A few minor suggestions when putting up into a suitable wood background:- you probably don?t to waste time measuring out with the paper template provided as you can mark through the bike rack itself- you will need to drill pilot holes as the screws provided are chunky and won?t go straight into the wood- the red plastic sections are a little fiddly to get used to as they weren?t clear on the instructions, at least to me. This is my second pair of golf sandals. My daughter loves these, the only downside is the plug wire had already broken. It helps to keep my children focused when they?re wearing these kinds of headsets and this one my daughter seems to really like. Sometimes I take a 7, sometimes an 8.