if the hole in your canvas is now bigger than the snap ,you will have to go larger. but i am not sure if they come any larger??? if they do ,then you would have to replace both male and female part of the snap.
So is that what comes in this kit, the male and female parts. I take it that you place the male part of one side of the canvas and the female part on the other side of the canvass and use the tool to join them?
Also is the 1/4" barrel referring to the actual center protrusion or what?