Promotional Paper & Plastic Bags, 7 1/2 x 9 Digital Full-Color DoorKnob - 2.0 mil, Our Digital Full-Color Doorknob bags are a cost-effective, leave-behind marketing tool with a 1 1/2 " round hole that fits around most standard doorknobs. Add a vibrant, eye-catching imprint to these 2.0 mil. plastic bags and fill the inside with brochures, samples, coupons, and more. ... #FCDK79 $0.87/each.