Mattress and Base Specifications

Planning for your new bed or need to measure your space? Mattress dimensions are standard. Base specifications vary by base type. 

Sleep Number® Mattresses 

  • Twin: 38"w x 75"l
  • Twin XL: 38"w x 80"l
  • Full/Double: 54"w x 75"l
  • Queen: 60"w x 80"l
  • King: 76"w x 80"l
  • Cal King: 72"w x 84"l
  • Mattress profile (height) varies by model.  Profile height is measured by laser at the center of the mattress at it's fullest Sleep Number setting.  

Sleep Number 360® Smart FlexFit™ Adjustable Base 

Measure your furniture before your bed arrives.

Your 360 smart FlexFit base will fit inside most standard furniture, except platform furniture or furniture with under bed storage. We recommend measuring the inside of your furniture to make sure your furniture will work with a FlexFit base. Headboard brackets are sold separately.

Headboard brackets are sold separately.

You need headboard brackets if you plan to attach a head board directly to your base. We suggest adding decorative legs to give your base a finished look if not placing your base inside a bed frame.

  • Twin XL: 37”w x 79.5”l
  • Full/Double: 52.5”w x 73.5”l
  • Queen: 58.5”w x 79.5”l
  • King (Include Split and FlexTop King): 75”w x 79.5”l
  • Cal King (Include Split and FlexTop Cal King): 72”w x 83.5”l
  • Height (all sizes): 7 adjustable settings ranging from 13.75”-18.25” from floor to top of base
  • Weight of base: FlexFit 1: 110 lbs; FlexFit: 116 lbs; FlexFit: 138 lbs
  • Weight Limit: 600 lbs per side

Sleep Number® Integrated Base & Frame 

The Sleep Number 360 Smart integrated base can be combined with our custom stylish frame or placed inside any standard size bed frame with center support.

Headboard brackets are sold separately.

You need headboard brackets if you plan to attach a head board directly to your base and frame. A stylish frame must be used when attaching Sleep Number headboard brackets to an integrated base. Contact customer service if you need to add a frame to your order.

Queen comes as split or one piece

The integrated base does not bend. If you have a narrow stair case, narrow entry to your home or bedroom we strongly encourage you to choose a split queen integrated base over one solid piece.

  • Twin: 37.5"w x 74"l
  • Twin XL: 37.5"w x 79"l
  • Full/Double: 52.5”w x 74”l
  • Queen: 59.5”w x 79”l
  • Split Queen: 29.75"w x 79"l per side (2 pieces)
  • King: 37.5”w x 79”l per side (2 pieces)
  • Cal King: 35.5”w x 83”l per side (2 pieces)
  • 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 

Optional frame

Compatible with the integrated base only. Cannot be combined with a modular base. A stylish frame must be used when attaching Sleep Number headboard brackets to an integrated base.

Sleep Number® Modular Base (sold with s1 and s3 mattresses)

The Sleep Number Modular Base can be purchased with or without legs. Place the base inside any bed frame with center support when not used with the optional frame.

Headboard brackets and legs are sold separately.

Legs are required if attaching a headboard directly to your base. Check out our Modular Base assembly guide to see leg and headboard bracket options.

  • Twin: 37.5"w x 74"l
  • Twin XL: 37"w x 79"l
  • Full/Double: 52.5”w x 74”l
  • Queen: 59.5” w x 79”l
  • Split Queen: 29.75"w x 79"l per side (2 pieces)
  • King: 37.5”w x 79”l per side (2 pieces)
  • Cal King: 35.5”w x 83”l per side (2 pieces)
  • Height without legs(all sizes): 8"
  • Height with low profile legs (all sizes): 12.5"
  • Height with standard legs (all sizes): 12.5"
  • Weight Limit: 400 lbs. per side 
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