XL Family Bed Size Guide: 120-Inch vs. 152-Inch for Your Boca Raton Bedroom

By Madison Parker, Luxury Home and Boca Raton Design Writer at SoBe Furniture

In an earlier article we made the general case for bigger beds and better sleep. This article is the practical follow-up: the one you read with a tape measure in hand. If you already know you want an XL family bed, the real question is which width, and whether your room can take it.

SoBe Furniture builds every XL family bed to order in two widths: 120 inches and 152 inches. Below is how those numbers compare to every other oversized size, how to do the room math, and how to decide between the two.

Two widths, two mattress pairs

An XL family bed is one continuous bed frame, with one headboard, that is wide enough to hold two standard mattresses side by side. The 120-inch bed holds two Queen mattresses (60 x 80 inches each). The 152-inch bed holds two King mattresses (76 x 80 inches each). The result looks and feels like a single oversized bed, but it is dressed with mattresses and bedding you can buy anywhere.

Families use them for co-sleeping with young kids, for dogs who refuse to sleep on the floor, for weekend movie nights, and sometimes simply because two adults want a very large bed.

Oversized bed sizes compared

Standard sizing stops at King, and after that the names get confusing. For background on each of these formats, see Bigger Beds, Better Sleep; here the point is where SoBe's two widths land against them.

Notice that the 152-inch bed is wider than an Alaskan King by nearly four feet, and the 120-inch bed is a foot wider. Yet both keep the familiar 80-inch mattress length.

Why two mattresses is the smart part

The single-mattress oversized formats in that table (Wyoming, Texas, Alaskan) require custom mattresses and custom sheets, which are harder to find and replace; we covered why custom mattresses get expensive in our earlier article. An XL family bed is sized for two standard mattresses instead: two Queens (60 x 80) at 120 inches, or two Kings (76 x 80) at 152 inches. You buy mattresses and bedding in standard sizes, replace one side without replacing the other, and each sleeper can choose a different firmness. SoBe builds the bed; you choose the mattresses.

The room-width math

This is where most people need a pencil. Convert the bed width to feet, then add walking clearance on each side. Using the 30-inch-per-side clearance rule from our earlier guide, here is what each width needs for comfortable movement, nightstands, and making the bed.

The 152-inch bed

152 inches is 12 feet 8 inches. Add 30 inches on each side (60 inches total) and you want a wall of about 212 inches, or 17 feet 8 inches. This is a primary-suite bed. Rooms of roughly 18 feet or wider on the bed wall handle it gracefully.

The 120-inch bed

120 inches is exactly 10 feet. With 30 inches per side you want about 180 inches, or 15 feet, of wall. A bedroom with a 14- to 16-foot bed wall will take a 120-inch bed; at 14 feet the clearance is snug, and at 15 feet or more it is comfortable.

Two worked examples

A 14 x 16 foot bedroom, bed on the 14-foot wall. That wall is 168 inches. A 120-inch bed leaves 48 inches, or 24 inches per side. Tighter than ideal but walkable, especially with slim nightstands or none. A 152-inch bed would leave only 16 inches total, which does not work.

An 18 x 20 foot primary suite, bed on the 18-foot wall. That wall is 216 inches. A 152-inch bed leaves 64 inches, or 32 inches per side. Comfortable. A 120-inch bed would leave 48 inches per side, which is generous but may look small on a wall that long.

Also account for depth. Both widths hold 80-inch-long mattresses, and the upholstered frame and headboard add to that footprint, so check the finished dimensions of your chosen model in the showroom before committing. Both widths arrive in sections and are installed in the room, so the wall matters more than the doorway; for entry-path guidance, see the earlier article.

Who the 120 suits, and who the 152 suits

Choose the 120-inch bed if you are two adults and one small child, or two adults and a dog, and your bedroom wall is roughly 14 to 17 feet. It is the practical XL: generous without dominating a normally proportioned room.

Choose the 152-inch bed if you have two or more children who migrate in at night, large dogs, frequent movie nights with the whole household, or two adults who each want a full King of space. Plan on an 18-foot wall or larger, and think of it as the anchor of the room rather than a piece of furniture in it.

Unsure? The showroom team can take your wall measurement and tell you which width fits.

The four signature SoBe designs (or bring your own)

Every model in the XL Family Bed collection is made to order in either width and comes in more than 30 leather, PU, and fabric options, chosen in person at the Boca Raton showroom. The four are starting points, not the limit: if none of them is your bed, bring a photo, an inspiration image or your own sketch and the team will design a fully custom XL family bed around it, in either width.

The Cuddle Continent (from $7,449) pairs a low, fully upholstered base with a tall vertical channel-tufted headboard at 75 inches high. Softly rounded edges make it the friendliest silhouette for a room full of kids.

The Grand Haven (from $7,799) is the statement piece: a padded grid headboard standing 95 inches high, a soft upholstered frame, and oversized proportions that suit the 152-inch width. Its headboard stands 95 inches tall, just under a standard 8-foot ceiling, so plan the Grand Haven for a room with 9-foot ceilings or higher.

The Maison XL (from $7,449) has a low rounded platform base with curved corners and a vertical channel-tufted headboard at 75 inches. It reads lighter and more sculptural, a good match for a 120-inch build in a mid-size room.

The Monaco XL (from $7,449) turns the channels horizontal on a tall, minimal headboard with rounded padding, also 75 inches high. It is the most contemporary of the four.

Made to order, in either width

Both widths are built to order and delivered in sections for installation in your bedroom, which is why the wall measurement above is the number that decides the size. Ordering steps, deposit, lead times, and delivery areas are covered on the XL Family Beds page.

Frequently asked questions

Are all four designs available in both widths?

Yes. The Cuddle Continent, Grand Haven, Maison XL, and Monaco XL are each built to order in 120 or 152 inches, and so is a fully custom design.

Is there a gap between the two mattresses?

Two standard mattresses sit side by side inside one frame. The bed is built for that configuration; how you dress the seam is up to you, and the showroom team can point you to the finished dimensions so your bedding fits.

Which width fits a 14-foot bedroom wall?

The 120-inch bed, leaving about 24 inches per side. The 152-inch bed needs roughly 18 feet of wall.

See it in person: our Boca Raton showroom at 6599 N Federal Hwy is open seven days a week.