S = 50-Piece Pack M = 120-Piece Pack. This complete bookmark kit includes 50 double-sided, dye-sublimation metal bookmark blanks and 50 colorful tassels. The bookmarks are crafted from 0.43mm-thick aluminum, with each piece measuring 6 x 1.5 inches both sides are covered with a protective film to prevent damage to the coating. The double-sided design offers a larger surface area for customization, facilitating intricate and personalized creative projects. These bookmarks are water-resistant and crack-resistant, while their dye-sublimation coating ensures vibrant, full-color print results that resist yellowing over time. They make for ideal personalized gifts suitable for a wide variety of occasions. Usage Instructions: Please remove the protective film before performing dye-sublimation printing images must be mirrored prior to printing use a heat press at 365degree(s)F for 55 to 60 seconds. Weight: 0.95 lbs.