The length of the slats for the twin size bed frame is approximately 35 inches. Product Details Frame Material: Solid Wood Box Spring Required: No Adult Assembly Required: Yes Compatible with Adjustable Bed: No Frame Material Solid Wood Box Spring Required No Number of Slats Included 12 Distance between the Slats (Full, Twin Size) 3 Slat Material Solid Wood Center Support Legs (Full, King, Queen Size) Yes Center Support Legs (Twin Size) No Weight Capacity (Full, King, Queen Size) 1000 Pounds Weight Capacity (Twin Size) 500 Pounds Mattress Included No Recommended Mattress Thickness 8 Inches Headboard Included No Footboard Included No Compatible with Adjustable Bed No Supplier Intended and Approved Use Residential Use Wood Species Pine Country of Origin Made In Vietnam Assembly Level of Assembly Full Assembly Needed Adult Assembly Required Yes Suggested Number of People 1 Additional Tools Required All Tools Included Avoid Power Tools Yes