Voltaren Gel - I lost the dosing card and I was wondering how to measure the 2 gram or 4 gram?

How to measure 4 grams with the dosing strip

There is no info saying how much is in an inch or anything like that, but I found a phone number to call the manufacturer. I'd call and ask them to send another one.
1-800-452-0051... there is a picture of the card in the prescribing info but we can't be sure that's the correct size, so the phone number is the best I have to offer. You could also call your pharmacy and see if they have extra ones.