Bio-based, No. 10 window envelopes feature Canefields paper made using sugarcane waste fiber (Bagasse), an eco-friendly, sustainable, renewable resource. The WindowCycler window patch allows easy separation of the window material for recycling. Inside tint pattern protects your privacy and contents. Window measures 1-1/8" x 4-1/2" and is positioned 7/8" from left and 1/2" from the bottom. Sugarcane paper envelopes also feature a regular gum closure to seal the envelope securely.