The Thumbtip is the most useful item in magic. Available in a variety of sizes.
Also available Darwins Thumbtip Book - Trick after trick and trick using the wonderful Thumb Tip is described in this concise book. Harry Blackstone gets it all off to a great start with his opening remarks, and from there on in it's magic all the way. Over 100 terrific effects with devices that every magician owns or will soon!
Standard - 48mm long, 22mm opening
Soft - 54mm long, 22mm opening
King - 60mm long, 22mm opening
XXL 52mm long, 27mm opening
Fingertip - 50mm x 18mm
Little Fingertip - 45 mm x 16mm