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Home / Window Hoisting

What Size Window Do I Need for a Mattress?

Mattresses are flexible and only 8–14" thick on edge. Most windows handle them — the opening just needs to exceed the mattress thickness.

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Fit summaryFIG. FIT

Whether it fits comes down to the measurements most people skip.

measure exactlyAny window wider than 16" works. Standard: 32"×52" — plenty of room.
The spaceAny window wider than 16" works. Standard: 32"×52" — plenty of room.
What decides itMattress thickness (8–14") on edge = minimum window width. Flexible — bends to fit shorter openings.
What to measureKing: 76"×80"×10–14". On edge through window: 14" wide × 76–80" height (bendable).

Measure the item and the narrowest usable space yourself. Small differences in trim, packaging, hardware, and model configuration can change the result. Check your own measurements before you buy or move.

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Verdicts compare the supported item orientations against the measurements shown above. See our methodology

10,000+ fit checks run·Last check: a few minutes ago

“Checked 6 items against our new apartment in 10 minutes. Knew exactly what to order.” — New apartment

Measure smart

What to measure.

Four numbers decide nearly every fit check. Get these right and the rest follows.

  1. 01Mattress thickness — 8–14" on edge; this is the minimum window width needed
  2. 02Mattress width — king: 76", queen: 60". This is the height dimension when on edge; window must be tall enough or mattress must bend
  3. 03Window opening dimensions — measure clear opening with sash removed

Don't make these

Common mistakes.

Most “it didn't fit” stories trace back to one of these oversights.

  1. ⚠Trying to push a mattress through flat — fold or roll it (for memory foam) or stand it on edge to minimize the dimension facing the window
  2. ⚠Forgetting mattress-in-a-box won't recompress — if you unrolled a bed-in-a-box, it won't go back in the box; it must go through the window at full size
  3. ⚠Not using a mattress bag — the window frame, sill, and brickwork will scrape and tear the mattress cover; use a bag

Frequently asked

Questions we keep getting.

  • What window size for a king mattress?

    A king mattress on edge is 10–14" thick — any window opening wider than 16" works. The mattress width (76") can be bent to fit through shorter windows. Standard double-hung windows handle all mattresses.

    01

  • Can a mattress be hoisted without professionals?

    For second-floor windows, many people successfully hoist mattresses with rope and a helper above/below. Above the second floor, hire professionals. Mattresses are light (80–150 lbs) but awkward in wind.

    02

More like this

Related fit checks.

How Wide Does a Hallway Need to Be for a Mattress?Find the minimum hallway width for a mattress. Stand it on edge (8–14 inches wide) and even the narrowest hallways work.How Wide Do Stairs Need to Be for a Mattress?Find the minimum stair width for a mattress. Mattresses flex and stand on edge — even king mattresses fit most standard stairways.Will a Mattress Fit Through a Window?Check if your mattress will fit through a window opening. Covers king, queen, full, and twin sizes — window removal, bending foam mattresses, and hoisting.Will a Queen Mattress Fit in a Cargo Van?Check if a queen mattress will fit in a cargo van. Compare cargo dimensions for Sprinter, Transit, ProMaster, and rental vans.

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