I can't believe I haven't covered these previously but the 1963 Baseball Peel-Offs are, in my opinion, one of the better inserts ever created by Topps. These small (1 1/4" x 2 3/4"), colorful stickers were included in select wax and cello packs, probably commencing with the second series (Topps didn't always include inserts in series one). As this pack rip shows, they were definitely found in 4th Series packs. At a mere 46 subjects, it was the sole pack insert in a year where Topps was taking on Fleer for a share of the big league trading card market. 46 is a strange number for a Topps run of justabout anything, and I suspect there's a reason the set count landed there, which I'll get into momentarily.
First though, behold the colorful Peel-Offs:
That bright line running horizontally across the face of each player is an unfortunate production artifact, wherein the adhesive didn't see application at the cut line that splits the paper on the reverse. Speaking of reverses, three types can be found: instruction back facing left, instruction back facing right and blank. The instruction backs are mirror images (and measure the same, ignore the aspects of the two below, they are identical in size):
Blank, well, is blank:
You often see gum or glue residue on them, no surprise given the layout of the pack in the video I linked in the first paragraph above: