Size: 2.5 x 3.5 inches (64 x 89 mm); Ultra-thin 20 micron film (0.02 mm)); Standard size cards are the pitch size of inner sleeve. Made in Japan. The film is made with a 20 micron film. UV protection prevents fading over time. (It can cut 80% of the fade wavelength band) The normal thin inner sleeve is 30 microns, but the thinner material reduces light distortion, making it ideal for ornamental sleeves. ● Can be used as inner sleeve during gameplay to reduce the thickness of the deck. ● The material uses OPP film with excellent stability and UV protection agents, so it does not affect your cards. UV protection does not decrease over time, protecting contents for a long time. Perfect for storing your precious collectibles. The color of the film may differ slightly depending on the production lot, but it does not affect the UV protection.