Well, the original finishes at 1/2" X 1", 1' x 2", 1-1/2" x 3", 2" x 4", 2-1/2" x 5", 3" x 6", 3-1/2" x 7", 4" x 8", 4-1/2" x 9" and 5" x 10".
The Clipper II says it works for the in between sizes, so my guess is 3/4" x 1-1/2", - 1/4" x 2-1/2", etc. on up to 4-3/4" x 9-1/2". (The 1-1/4" x 2" and the 5-1/4" x 10" would be the unfinished sizes.)
I LOVE my Wing Clipper. Hate buying rulers for one thing that not only don't work well for the intended use but can only be used for that one thing. While these are only for flying geese, they do make several sizes.
There is a youtube video for them, but I haven't watched it to know if you can see both sizes or just the original.