1-48 of 718 results for "cot size bed frame" Results. Check each product page for other buying options. Price and other details may vary based on product size and color. Overall Pick. ZINUS SmartBase Compack Mattress Foundation, 14 Inch Metal Bed Frame, No Box Spring Needed, Sturdy Steel Slat Support, 75" x 30" (Narrow Twin), Black. Options: