Sleevie Wonder (est. 2008) BOX SET outer sleeves variety pack x12! 1.6mil thickness. Clear polypropylene plastic with resealable strip on flap for a custom closure. x4 SMALL, x4 MEDIUM, x4 LARGE. Box Set Sleeves Spine Thickness Size Chart: SMALL 3/8"-3/4" - MEDIUM+ 1" - 1-1/16" - LARGE+ 1-1/4" - 1-5/8". Protects from dust, dirty hands, oily fingertips, shelf wear, & minor impact + abrasions. Also preserves shrink wrap. Acid & lignin free, archival safe. Orders go out within 24 hours, USPS (worldwide). Buy other sizes too : ) All sleeves are BUY 2, GET 1 AT 50% OFF (add 3 to cart). Support Sleevie best w/ multiple items @ checkout ♥ All Vinyl and CD's are BUY 1, GET 1 AT 50% OFF (add 2 to cart).