Today I changed my Pro Staff Classic's grip size from 3/8ths to about 9/16ths so that I would be right at 5/8ths with an overgrip. You don't need to go and buy any heat shrink sleeves, you just need:
1. A roll of electrical tape
2. scissors
3. a measuring tape (the flexible kind)
4. a replacement grip (if yours needs to be regripped)
5. needle nosed pliers
First, remove your replacement grip (and overgrips too, obviously)... Pull out the staple that held your stock grip in.
Next, measure handle without the grip. Compare this to the measurement of the handle with the grip. Then subtract that difference from your desired grip size.
Then, wrap electrical tape on the handle like you would an overgrip. Do a 50% overlap all the way up to keep the thickness and shape as even as possible. This will give you a 16th of an inch, or half a grip size. Do this until you get to the ideal size, and alternate the way you wrap the tape, so you don't get confused about where you should overlap.
Then, test-fit your replacement grip, and measure it to see if it's at your ideal grip size yet, or if it's too big.
If it's good, wrap your replacement grip back on. If not, add another layer or take one off. If you're in between a size, you can add a layer that has zero overlap for an increment of 1/32nd. Or take off the original layer and do the same thing. Either way.
You might need to staple it into the butt cap if the adhesive on the grip has worn off, or you don't have any. Using a bit of tape actually works pretty well but it's less professional. A normal office stapler won't work for this... you'll need a staple gun with narrow staples.
Finish with a bit of finishing tape (you can use electrical tape that's been cut lengthwise), or just use the rubber band that goes over the tape on the stock grip to hold it in place. Or both.
Replace overgrip, if you use one.
Enjoy your custom-sized grip.
1. A roll of electrical tape
2. scissors
3. a measuring tape (the flexible kind)
4. a replacement grip (if yours needs to be regripped)
5. needle nosed pliers
First, remove your replacement grip (and overgrips too, obviously)... Pull out the staple that held your stock grip in.
Next, measure handle without the grip. Compare this to the measurement of the handle with the grip. Then subtract that difference from your desired grip size.
Then, wrap electrical tape on the handle like you would an overgrip. Do a 50% overlap all the way up to keep the thickness and shape as even as possible. This will give you a 16th of an inch, or half a grip size. Do this until you get to the ideal size, and alternate the way you wrap the tape, so you don't get confused about where you should overlap.
Then, test-fit your replacement grip, and measure it to see if it's at your ideal grip size yet, or if it's too big.
If it's good, wrap your replacement grip back on. If not, add another layer or take one off. If you're in between a size, you can add a layer that has zero overlap for an increment of 1/32nd. Or take off the original layer and do the same thing. Either way.
You might need to staple it into the butt cap if the adhesive on the grip has worn off, or you don't have any. Using a bit of tape actually works pretty well but it's less professional. A normal office stapler won't work for this... you'll need a staple gun with narrow staples.
Finish with a bit of finishing tape (you can use electrical tape that's been cut lengthwise), or just use the rubber band that goes over the tape on the stock grip to hold it in place. Or both.
Replace overgrip, if you use one.
Enjoy your custom-sized grip.