Great grip. I think it is about average thickness but it definitely weighs less. Compared to the stock volkl grip that it replaced, it was about 8 grams less. Would definitely recommend if you want to take a little weight out of the handle.
I teach junior tennis and many parents have no idea about grip size, overgrips, and replacement grips. I always tell them to buy the smallest grip size possible, because it's easy to put overgrips to make the grip bigger, but impossible to go the other way if they buy a grip too large. This replacement grip is half the thickness of the others, but still offers much better cushioning than resorting to putting two overgrips in place of the original grip. If you need additional cushioning, simply add an overgrip. I'm so happy to find this thickness to offer versatility. Buying a new supply today as i used the four I bought previously.
I have 6 rackets of the same type, but grip sizes ranging from 4 1/8 to 4 3/8. My preferred size is 4 1/4 with overgrip included. Using this as the replacement grip for the rackets with 4 3/8 allowed me to make the grip smaller to be about 4 1/4. I'm buying 4 more. I also use these on my student's rackets, and in some cases, their parents bought them a grip size that is too big.