Lightweight or Cushioned?. Usable Size 6.5″x10″ 8.5″x12 10.5″x16″ 12″x15.5″ 14.5″x19″ 19″x24″ 24″x24″. Self Seal ✔ ✔ ✔ ✔ ✔ ✔ ✔. Material Thickness 60 GSM 60 GSM 60 GSM 2.3 Mil 2.3 Mil 2.3 Mil 2.3 Mil.