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I'm going to regrip all my irons, and plan on buying grips online. I looked online and I've found out that my irons have .600 butt diameter.

Does that mean I have to buy grips with the same diameter? Or can I get away with .580. I want to keep my grips as thin as possible because I have small hands.

Ive regripped my ever since I took up the game. First of all you want to be sure the grips you buy are not to big to start with. My self I prefer to use avon jumbo shamois with 3 - 4 wraps of tape to were you should stick with a smaller grip and only 1 wrap of tape. Some people start a wrap on one side of the club up and over the butt and back down the other side just shorter than the length of the grip. some wrap it like a barber pole. I hope this helps you out.

You are fine with the .580 diameter grip. It will actually make the overall grip size (outside diameter) increase. Sounds odd but the bigger shaft(600) is now expanding the inside diameter(580), so like a balloon with air being put inside it, it will grow. Not a big difference to worry about. It will change maybe 3/32 of an inch. It is better to have that size, then try to install a .610 size cuz of slop between shaft and grip with out adding a lot of tape.

Using 0.580" grips on 0.6" butts is pretty common nowadays. However, it isn't that difficult to find 0.600 grips, so I would suggest that if you have smaller hands or prefer thinner grips. If you must use the 580s, another way to make them thinner is stretch them a little more when installing them... a 1/2 " or so should do the trick. BTW, 580s on 600s comes to be about 1/50" oversized, not 3/32"...thats huge

I dont know what clubmaking school you went to but putting a .580 on a .600 butt, yes is common but also WILL increase the diameter of the grip. He needs to find a smaller o.d. grip in a .600 i.d to maintain that smaller grip. That is taught at Dynacraft and Golfsmith that was taught also by Tom Wishon

I really think you should re-read my post. I basically agreed with you and then offered up different ways to accomplish this goal. One way is to use a 0.6" grip instead of a 0.580" grip on the shaft, this will reduce the inner core stretching of the grip thus effectively decreasing the size of the grip (or O.D. as you so graciously put it). I also stated that it is acceptable to stretch the grip further to make it thinner. We, as clubmakers, do not try to find grips of a certain OD.. this is manipulated by the core of the grip and layer tape. OD of a loose grip is not interesting. The problem I had with your post is the size approximation you gave when a 0.58 is installed on a 0.6. You probably scared the poor guy because you weren't even close. This tells me you've never built a set of irons that is meticulously on spec. Thats fine, they are many guys that are not that serious and just like to tinker. I'm all for that..its fun. I took a little offense when you sarcastically ask me what school I went to, Tom Wishon, and all that garbarge. But its not that big o'deal, but I was just trying to help because 3/32" is near jumbo and the poster wanted thin grips. I wasn't maliciously going after your post.

BTW, so you know, I am a TWGT gold member, so I know who Tom Wishon is

Ha ha ha yeah Sorry I did miss read your post. So I do apologize for that and the 3/32 was an example do to the fact I have no idea what grip he was refering to when asking the original question. And good I was right you would know who Tom Wishon is. Yes I am a tinkerer too and have assemble probably over 4 dz sets of clubs for co-workers, family,charity golf events, and friends. And honestly only had 2 complaints. (ofcourse from family). And I am sure I didnt scare the guy, if he was asking then I don't think 3/32 sounds all that big and hopefully he understood it was example due to not knowing the grip type. Who knows he could have a jumbo arthritic grip with a .580 i.d. on a .600 shaft, ha ha . Anyway I am sorry coming off like that no excuses. Friends?

Buy grips the same size as the shaft. To make the grips smaller stretch them down the shaft about 1" after they are installed and they will be smaller in diameter. Mark the shaft with the grip along side it and stretch to the mark, hold the grip stretched to the mark for about one minute so they don't "retreat".

Of course! One thing is obvious.. your love for the game, and thats all I need to know

Thanks, buddy I bleed the game, may many aces come your way

I still don't fully grasp the concept of grip sizes so let me give you an example of what I'm trying to work with and see what you come up with. If I put some .620 grips (which I have) on my .580 shafts will this result in a bigger grip size or smaller? How much so? Is this even feasible? I have standard 7-1/2" hands and the stock grips on my '04 Callaway Big Bertha irons have been fine but need replaced. Thanks all.

If you use 620 grips on 580 shafts, the end results will be a smaller diameter of the club. And the grips might not be tight enough to stay in place. As for making your grips a little smaller for your small hands, try installing the grips with air pressure, and don't use any tape at all. this will save about . 012", or twice the thickness of a piece of tape. As have been posted, you can also stretch the grip longer when you install it to make the grip thinner, which would help if you want the grip to be a little smaller. Using a 580 grip on a 600 shaft will make the finished product .020" larger in diameter. Pretty simple really.

when shaft diameters are measures are they inside or outside diameter? I imagine grip diameters are inside.

Should I cut one grip off one of my clubs before I order grips? Also, what is the best way to compensate for differing sizes of wood/iron shafts? more tape or a different size grip? I've read the fraphite shafts(woods) are typically thinner than the iron shafts. My irons are 15-16 years old, so I have no idea what their diameter is :). Whereas my woods are newer.

The measuring numbers represent the opening of the grip ( inside ) so, assuming the outside is the same diameter, the smaller the number the thicker the wall.
To answer the original posted questions, using the .58 grip on the .60 butt wil result in a slightly thicker grip ( apprx. 1/64 th if not slightly larger ).
This, in MHO will not influence too much on your feel for the grips; eating more salted food the day before might swell up your body more than tyou could feel for the 1/64th difference in grip.
I don't think you need to worry too much on the new grip that you need to order. .058 should be fine and if you have a great deal on the ,60 siaze, just put one more wrap of masking tape under the double sided tape to compensate, the size will feel slightly smaller after you weather and play it for awhile.
The only way to get scientific on the issue is to cut one grip and measure the butt.

ok, so gripping my woods and irons with the same grips should be OK, cool.