The Blue Chip TD is a standard teardrop shape pick with two rounded corners and one sharper playing corner. The TD40 is 40/1000 of an inch (1.00mm) thick, the TD50 is 50/1000 of an inch (1.25 mm), and the TD60 is 60/1000 of an inch (1.50 mm). All Blue Chip picks a professionally machined, hand beveled, and laser etched.