Bed Frame Sizes: Footprint, Height and Headboard Dimensions
How much floor each bed frame really takes, how tall frames and foundations are, what slat spacing a mattress needs, and the dimensions of headboards, bunk beds, daybeds and Murphy beds.
A bed frame is always larger than its mattress. A queen frame takes about 61–62 × 81–84 in for a metal or slim platform frame, 63–66 × 85–92 in for an upholstered frame with headboard, and up to 68 × 97 in (173 × 246 cm) for a sleigh bed. King frames are 16 in wider than queens; twin frames start at about 39 × 76 in.
- Queen, slim frame
- 61–62 × 81–84 in
- King, slim frame
- 77–78 × 81–84 in
- Platform deck height
- 10–14 in typical
- Max slat gap
- About 3 in (7.6 cm)
On this page
Bed frame dimensions by mattress size
The mattress sets the inside of the frame; the style sets the outside. A minimal metal frame or platform adds only an inch or two. Upholstered frames add padding on all sides plus a headboard, and sleigh beds curve out at both ends. Use the outside footprint for room planning.
| Mattress | Mattress size | Metal or slim platform | Upholstered or wood, with headboard | Sleigh bed |
|---|---|---|---|---|
| Twin | 38 × 75 in | 39–40 × 76–78 in | 41–44 × 80–86 in | 42–46 × 85–92 in |
| Full | 54 × 75 in | 55–56 × 76–78 in | 57–60 × 80–86 in | 58–62 × 85–92 in |
| Queen | 60 × 80 in | 61–62 × 81–84 in | 63–66 × 85–92 in | 64–68 × 90–97 in |
| King | 76 × 80 in | 77–78 × 81–84 in | 79–82 × 85–92 in | 80–84 × 90–97 in |
| California king | 72 × 84 in | 73–74 × 85–88 in | 75–78 × 89–96 in | 76–80 × 94–101 in |
In metric, a slim queen frame is about 155–157 × 206–213 cm and a sleigh queen up to 173 × 246 cm. The difference between the slimmest and bulkiest queen frame is about 7 in of width and 16 in of length, which can decide whether a dresser still fits at the foot of the bed. Mattress sizes themselves, including UK and European ones, are listed in the mattress size chart.
Bed frame heights
Frame height is measured to the top of the rails or the platform deck, the surface the mattress (or box spring) rests on. Add the mattress depth to get the sleeping height.
| Frame type | Height to support | Notes |
|---|---|---|
| Floor or low-profile platform | 4–8 in (10–20 cm) | Modern and Japanese-style; little under-bed space |
| Metal frame (for a box spring) | 7–8 in (18–20 cm) | Needs a foundation on top |
| Standard platform | 10–14 in (25–36 cm) | With a 12-in mattress, gives a 22–26 in sleeping height |
| High platform | 14–18 in (36–46 cm) | Room for storage bins underneath |
| Storage bed (drawers or lift-up) | 14–20 in (36–51 cm) | Drawers need clear floor beside the bed to open |
Most adults find a sleeping surface 20 to 25 in (51 to 64 cm) off the floor easiest to sit on and get up from. The mattress depth guide works through the totals for common combinations.
Under-bed clearance
- Storage containers: most under-bed boxes are about 6 to 7 in tall, so look for at least 7 to 8 in of clearance under the rails.
- Robot vacuums are typically 3 to 4 in tall. A frame with 4 in or more of clearance, measured under the lowest rail or slat, lets one clean underneath.
- Storage bed drawers pull out 16 to 20 in. Leave that much plus about 12 in to stand, which is more than the usual 24-in walkway.
Box springs, foundations and slat spacing
Whatever sits under the mattress has to support it evenly. Mattress warranties commonly specify the support, and a wrong one can void the warranty.
| Support | Height | Notes |
|---|---|---|
| Standard box spring / foundation | 9 in (23 cm) | Raises a low frame to normal bed height |
| Low-profile foundation | 4–5 in (10–13 cm) | For thick mattresses or taller frames |
| Split foundation | Either height | Two pieces: queen 2 × (30 × 80 in), king 2 × (38 × 80 in), Cal king 2 × (36 × 84 in) |
| Slatted platform | Part of the frame | No foundation needed if slats are close enough |
- Slat gaps: most foam and hybrid mattress makers require slats no more than about 3 in (7.6 cm) apart, and some specify 2.75 in. Wider gaps let foam sag between slats.
- Center support: full, queen, king and Cal king frames need a center rail running head to foot with at least one leg to the floor. King frames typically have two or more center legs.
- Old frames with wide slats can be fixed with a bunkie board (a 1 to 2-in solid panel) or extra slats rather than a new frame.
Read the mattress warranty's support requirements alongside the frame's slat spacing. A bed-in-a-box mattress on a frame with 5-in slat gaps can develop dips that the warranty will not cover.
Headboard sizes
Headboards are sold to match the frame width, usually a little wider than the mattress. Height is measured from the floor, and only the part above the mattress shows.
| Bed | Headboard width | Total height from floor |
|---|---|---|
| Twin | 39–42 in (99–107 cm) | 40–56 in (102–142 cm) |
| Full | 54–58 in (137–147 cm) | 44–60 in (112–152 cm) |
| Queen | 60–65 in (152–165 cm) | 48–60 in (122–152 cm) |
| King | 76–82 in (193–208 cm) | 48–60 in (122–152 cm) |
| California king | 72–78 in (183–198 cm) | 48–60 in (122–152 cm) |
- Visible height: subtract the sleeping height. A 54-in headboard behind a bed whose mattress top is at 24 in shows 30 in, enough to lean against. Under about 12 in visible, it does not support your back when sitting up.
- Wall-mounted headboards: mount so the bottom edge sits 2 to 6 in below the top of the mattress, so no gap shows above the pillows.
- Bolt-on headboards attach to metal frame brackets, but hole spacing differs by brand. Check that the frame's brackets are adjustable before buying them separately.
- Windows and outlets: measure the sill height and outlet positions on the headboard wall before choosing a tall headboard.
Bunk, loft, daybed, trundle and Murphy bed dimensions
| Frame | Mattress | Typical footprint | Typical height |
|---|---|---|---|
| Bunk, twin over twin | 2 × twin (38 × 75 in) | 42 × 80 in (107 × 203 cm) | 60–68 in (152–173 cm) |
| Bunk, twin over full | Twin + full | 57 × 80 in (145 × 203 cm) | 62–70 in (157–178 cm) |
| Loft bed (twin) | Twin or twin XL | 42 × 80–85 in | 55–72 in (140–183 cm) |
| Daybed | Twin | 41–44 × 78–80 in | Back and arms 35–45 in |
| Trundle (under a daybed or twin) | Twin, up to 6–8 in thick | Pulls out about 40 in | Trundle frame 8–12 in |
| Murphy bed, queen (vertical) | Queen, usually up to 10–12 in | Cabinet about 65–67 in wide; 85–90 in from wall when open | Cabinet about 85–90 in |
| Canopy / four-poster, queen | Queen | 63–68 × 84–90 in | 80–90 in (203–229 cm) |
Bunk bed safety and ceiling height
US bunk beds must meet 16 CFR Part 1513 (based on ASTM F1427). The upper bunk needs guardrails on both sides whose top edge sits at least 5 in above the mattress, and the bed carries a label with the maximum mattress thickness. The CPSC advises that children under 6 should not sleep on the top bunk.
For headroom, subtract the top mattress surface height from the ceiling. A twin bunk whose top mattress surface is about 60 in off the floor leaves 36 in under an 8-ft (96-in) ceiling, enough for a child to sit up. Loft beds with a desk underneath are taller and are better suited to 9-ft ceilings. Children's furniture sizes are collected in the kids' furniture guide, and the step before a twin is covered in the toddler bed guide.
Murphy beds and canopy beds
A vertical queen Murphy bed needs both a ceiling tall enough for the cabinet and open floor for the whole bed length when down. Confirm the exact figures with the maker, because mechanisms vary. Canopy and four-poster beds stand 80 to 90 in tall, so they need at least an 8-ft (96-in) ceiling, and a 9-ft ceiling keeps a 90-in frame from looking cramped. Do not place one under a ceiling fan.
Adjustable bases
Adjustable bases match the mattress size exactly (a queen base is 60 × 80 in) and either stand on their own legs or sit inside an existing frame. Base height is usually adjustable from about 10 to 16 in with interchangeable legs.
- Inside a frame: the frame's inside opening must be at least the base size, and its rails must not block the base when it lifts.
- Split king: two twin XL bases (each 38 × 80 in) side by side, so each sleeper adjusts independently.
- Wall clearance: bases without a "wall-hugging" mechanism move the mattress away from the wall as the head rises, so leave a few inches behind the headboard.
How to choose and measure for a bed frame
- Confirm the mattress size by measuring it, especially for older, RV or imported mattresses.
- Measure the room and subtract walkways: at least 24 in on each open side and at the foot.
- Compare the frame's outside dimensions with that space, not the mattress size.
- Add the heights: frame + foundation + mattress should land near 20 to 25 in for most adults.
- Check the delivery path. Headboards and side rails come in boxes, but a fully upholstered headboard can be 65 in wide and must pass through doors and stairwells.
Nightstands, dressers and walkway clearances around the bed are covered in the bedroom furniture dimensions guide; nightstand heights specifically are in the nightstand size guide.
Frequently asked questions
Is there a standard bed frame size?
There is no regulated frame size. Frames are built around the standard mattress sizes (queen 60 × 80 in, king 76 × 80 in and so on) with an inside opening about 0.5 to 1 in larger, and the outside footprint depends on the style.
Do I need a box spring with a bed frame?
Only with a frame that has side rails and no slats or deck, such as a basic metal frame. Platform beds and slatted frames support the mattress directly. Most foam and hybrid mattress makers allow either, as long as the support is solid or has slats no more than about 3 in apart.
How tall is a bunk bed?
Twin-over-twin bunk beds are typically 60 to 68 in (152 to 173 cm) tall with a footprint of about 42 × 80 in. With a standard 8-ft ceiling, that leaves roughly 30 to 36 in of headroom above the top mattress.
Will a king mattress fit a California king frame?
No. A king is 76 × 80 in and a Cal king is 72 × 84 in, so a king is 4 in too wide for a Cal king frame and would leave a 4-in gap at the foot. Frames, like fitted sheets, are not interchangeable between the two.
How big is a daybed?
Most daybeds take a twin mattress (38 × 75 in) and have a footprint of about 41 to 44 × 78 to 80 in, with back and arm panels around 35 to 45 in high. A daybed with a pull-out trundle needs about 40 in of clear floor in front to open it.