I used the T-pins that about 2in. long. Wrap the batting around to the edge of the board and insert the pin into the side of the board. I use enough that I don't have to worry about the batting coming down or them being in the way. This way, if you need to take the batting down to clean it, the job will be much easier. I use flannel for my board and I've taken it down a time or two to clean it with no issues.