Originally Posted by Sadiemae

I thought you meant the length of the leaders(horizontal), the vertical size of the leaders people use can vary from about 7" to 24". The first leaders I made were about 12", the leaders I use now are about 20"(The poles were different sizes). Basically it needs to be able to wind around your pole several times before it attaches to the quilt. You can use muslin as suggested, but my second set is much nicer and thicker than muslin.