What size bed frame do I need for a queen mattress?
A queen mattress measures 152 cm by 203 cm (60 in by 80 in), so the frame's internal opening must match those dimensions exactly. Check three things before buying: the internal rail-to-rail width and length, since a frame built for a full or king will leave gaps or compress the mattress; the outer footprint, which typically adds 5–10 cm (2–4 in) per side for posts and rails; and the headboard attachment, which varies by frame design. If the frame lists a mattress size rather than dimensions, confirm the internal measurements with the manufacturer before ordering.