I realise this isnt a strict 'racquets' thread but there seem to be a lot more knowledgeable people who post in this section so I though I might get a more intelligent answer and it might be somewhat informative for anyone looking to make a racquet purchase. Something Ive never thought of before, when buying a racquet, is the way in which temperature can affect your hand, therefore, your grip. That is, until my girlfriend pointed out that in the hotter months your fingers swell (as she finds when putting on rings) and in the very cold months there is contraction (a shortening). That made me think, given that I now live in a climate which is either warm or very hot (plus extremely humid) year round, that the grip size I thought to be correct is, most likely, not the right one. I've always used a 4 5/8 grip but have been surprised to find, since shifting to my current location, it no longer felt comfortable whereas a 3/8 grip was far, far more playable (albeit just a touch too small). Why the discrepancy? In the shop a 3/8 felt too small and a 5/8 felt just right. However, after a set of tennis it was the exact opposite. Is it, as I assume, that in the moderate temperature of the shop the hand has not swollen at all, so the larger grip feels right, whereas when playing the hand swells and the smaller grip becomes the correct size? Im curious to see what others think as it could well be another thing to take into account (climate we play in) when selecting a racquet but is something we constantly overlook or, more likely, just never think of but could affect our sense of a racquet's playability. All I do know is that my next racquet will be either a 3/8 or a 1/2 at largest.