Planning for your new bed or need to measure your space? Mattress dimensions are standard. Base specifications vary by base type.
You'll find specifications for:
Sleep Number® Mattresses
| Size | Width | Length |
| Twin | 38" | 75" |
| Twin XL | 37.5" | 79.5" |
| Full/Double | 53.5" | 74.5" |
| Queen | 60" | 80" |
| King | 76" | 80" |
| California King | 72" | 84" |
- Mattress profile (height) varies by model.
Note: Mattress dimensions may vary, including slight expansion over time and may initially measure under the stated dimensions based on model and build to ensure proper base fit over time.
Sleep Number Adjustable Bases
Measure your furniture before your bed arrives.
Sleep Number FlexFit® smart adjustable base will fit inside most standard furniture, except platform furniture or furniture with under bed storage.
The Adjustable Base can be used without leg on a flat surface or on slats that are 2" to 3" apart.
Current FlexFit and Adjustable Base Dimensions
| Size | Width | Length |
| Twin XL | 37.5" | 79.5" |
| Full/Double | 53.5" | 74.5" |
| Queen | 59.5" | 79.5" |
| King | 75.5" | 79.5" |
| California King | 71.5" | 83.5" |
Current FlexFit and Adjustable Base Weights
Size |
Adjustable Base |
FlexFit® 1 |
FlexFit® 2 |
FlexFit® 3 |
Twin XL |
90 lbs. |
90 lbs. |
90 lbs. |
90 lbs. |
Full/Double |
104 lbs. |
105 lbs. |
105 lbs. |
105 lbs. |
Queen |
116 lbs. |
115 lbs. |
115 lbs. |
115 lbs. |
King |
178 lbs. |
170 lbs |
170 lbs. |
170 lbs. |
California King |
185 lbs. |
180 lbs. |
180 lbs. |
180 lbs. |
- Current FlexFit® 1, 2 and 3 King and Cal King (Include Split and FlexTop models): Two bases side by side are secured together at the head and foot by a metal bracket called a bed link.
- The bed link connects both sides and keeps them the correct distance apart.
- FlexFit Weight Limit: 600 lbs. per side.
- Adjustable Base Weight Limit (including mattress): 850 lbs. total.
- See Finding My Bed Height for base height.
Sleep Number non-adjustable bases
Integrated base and optional frame
The Sleep Number integrated base can be combined with our custom stylish frame or placed inside any standard size bed frame with center support.
| Size | Width | Length |
| Twin | 37.5" | 74" |
| Twin XL | 37.5" | 79" |
| Full/Double | 53.5" | 74" |
| Queen | 59.5" | 79" |
| King (2 pieces) | 37.5" | 79" |
| California King (2 pieces) | 35.5" | 83" |
- Height without optional frame (all sizes): 8" from floor to top of base.
- Height with frame (all sizes): 17" from floor to top of base.
- Weight Limit: 400 lbs per side.
Queen size Integrated Bases comes as split or one piece
The integrated base does not bend. If you have a narrow staircase, narrow entry to your home or bedroom we strongly encourage you to choose a split queen integrated base over one solid piece. Either will work for our Queen size smart beds.
Optional Frame
Compatible with the integrated base only.
Must be used when attaching Sleep Number headboard brackets to an integrated base.
Foundation and optional leg kit
The Sleep Number foundation can be combined with our leg kit or placed inside any standard size bed frame with center support.
| Size | Width | Length |
| Twin | 38" | 75" |
| Twin XL | 38" | 80" |
| Full/Double | 54" | 75" |
| Queen | 60" | 80" |
| King | 76" | 80" |
| California King | 72" | 84" |
- Height without optional frame (all sizes): 6" from floor to top of base.
- Height with frame (all sizes): 16" from floor to top of base.
- Weight Limit: Full/Double, Queen, Eastern King, and California King 800 lbs. total.
- Twin, Twin XL: 400 lbs. total.
Optional leg kit
- Compatible only with a Sleep Number foundation.
Must be used when attaching Sleep Number headboard brackets to a foundation.