How to Choose a King Bedroom Set: Sizes, Room Fit and What's Included

What size is a king bed?

The Better Sleep Council lists a king mattress at 76 inches wide by about 80 inches long. Merriam-Webster gives the same size for a king-size bed. That's about 16 inches wider than a queen (60 x 80), and it gives each of two sleepers 38 inches of width, about the same as a twin bed.

The bed frame is always bigger, because the headboard, footboard and side rails wrap around the mattress. Here are the mattress sizes next to the frame sizes we counted on our product pages.

Not every bed page lists its king frame size. Most of the 52 that do come from one builder, so always check the page for the bed you like, or ask us for the numbers.

King vs California king: which fits your room?

A California king is not bigger, just shaped differently. The Better Sleep Council puts it at about 72 by 84 inches: 4 inches narrower and 4 inches longer than a standard king. On the 39 bed pages on our site that list both frames, the California king is 4 to 4¾ inches narrower and 3¼ to 4 inches longer than the king.

Choose a king if

Two people share the bed and want the most width, or your room is wide but not long. The extra width also helps if a child or a pet ends up in the bed.

Choose a California king if

One of you is tall and your feet hang off the end, or the room is long and narrow. Keep in mind that bedding is not shared between the two sizes. The Better Sleep Council notes that regular king sheet sets won't fit a California king properly.

How big should a bedroom be for a king bed?

Start with two numbers: the wall the bed goes on, and the distance from that wall to whatever is across from it.

The headboard wall

Add the frame width to the width of your nightstands. Our Arlington Panel Bed in king is 83¼ inches wide, and the Arlington nightstands are 24 inches wide. Together that's 131¼ inches, or 10 feet 11¼ inches, before you leave any gap. In California king the same bed is 79¼ inches wide, so the group takes 127¼ inches. Leave room to walk past each side you get in from.

The length of the room

The Arlington king frame is 87½ inches long. If a 20-inch-deep dresser goes on the wall facing the foot of the bed, bed plus dresser already use 107½ inches, almost 9 feet, with no space yet to walk or to pull a drawer open. A California king adds 4 more inches. Tape the frame's outline on the floor, open a drawer on your current dresser and measure how far it reaches.

Code minimums are not a king room

The International Residential Code requires habitable rooms of at least 70 square feet and at least 7 feet in any horizontal direction. A king frame of about 80 by 87 inches covers almost 49 square feet by itself, so a room built to the minimum won't hold a king set. Also measure the doorways, halls and stairs on the way in. The Better Sleep Council suggests this for king mattresses, and it applies to a headboard and a dresser too.

What comes in a king bedroom set?

There's no fixed list. In a furniture store, a bedroom set usually means pieces from one collection that share the same design and finish. We counted the 68 bedroom collections on our site:

• All 68 include a bed, at least one nightstand and a dresser. 126 of the 129 dressers in these collections list a mirror.
• 66 also include a chest of drawers or another tall chest, like a chiffonier or a gentleman's chest.
• 42 include an armoire or wardrobe, 27 a lingerie chest and 10 a blanket chest.
• 26 offer both a high and a low dresser, so you can choose by wall height.

The collections range from 3 to 19 pieces, and the middle is 9. A basic set is the bed, nightstands and a dresser with mirror; a chest or an armoire adds storage. To see how one line fits together, here is the Arlington line from one of our builders, with sizes from each product page.

The storage pieces share a depth of about 20 inches, so they line up along a wall. A 62-inch dresser and a 36-inch chest need 98 inches of wall together, which is worth checking against the wall across from the bed. For sizes of every bedroom piece, see our solid wood bedroom furniture guide.

Which mattress goes with a king bed?

We sell mattresses as well as beds. The 18 on our site all come in king and California king. Their pages list heights from 9 to 17 inches and rate each one on a firmness guide from 1 (most plush) to 8 (most firm). Ten are double-sided. Browse them in our mattress collection.

Box spring, foundation or slats?

When you order a bed, tell your salesperson whether you'll use a standard mattress and box spring, a foundation, or an adjustable base. It changes what the bed needs. Each mattress page offers a foundation choice, including "None" for a bed with its own slats, slat foundations in standard or low profile, and bunkie boards. Five also offer an 81-coil box spring. On our beds, 45 pages from one builder say king sizes get four slat supports, against two for queen, and four storage beds with drawer units say no box spring is needed.

Mattress height and nightstands

Mattress height adds up fast. On 41 of our beds the top of the slats sits 11¼ inches off the floor, so a 10-inch mattress puts the top of the bed at about 21 inches, and a 17-inch one at about 28 inches. Pick nightstands after you know that number. If you have an older or odd-size bed, read our post on custom mattresses for antique beds; 17 of our mattress pages say custom sizes are available by special order.

Can a king bed add storage?

Yes, and in a king room it can replace a piece of furniture. 64 of our 139 bed pages list storage rails, footboard drawers or a drawer unit, either as standard or as an option. The Arlington Panel Bed, for example, lists side storage rails and footboard storage drawers as options. Drawers in the side rails need room to open, so leave a clear path along that side. See our storage beds.

Should a king bedroom set match?

It doesn't have to. A set from one collection keeps the sizes and details consistent, which is why most people start there. But you can mix: keep the bed and nightstands matched and let the dresser or chest differ a little in wood or stain. Because most of our furniture is made to order, you can usually choose the wood and stain for each piece. Compare finishes in our guide to Amish stain colors. Whatever you choose, anchor tall chests and dressers to the wall. The U.S. Consumer Product Safety Commission's Anchor It! campaign says anchoring furniture with drawers, doors and shelves prevents tip-over injuries and deaths.

Build a king set: bed, nightstand, dresser, mattress

Where can you see a solid wood bedroom set in person?

Kings Amish Furniture is a family business that began in Raymond King's woodshop in 1986, and we work with more than 40 Amish builders. You can see bedroom sets in our three showrooms: Intercourse, PA (13 Center St), Lancaster, PA (2460 Lincoln Hwy E, Rockvale) and Murrells Inlet, SC (12052 Hwy 17 Bypass N). We're open Monday to Friday 10 to 5 and Saturday 9 to 5, and closed Sunday. See store locations and what to expect when you visit, or browse all beds and the full bedroom collection online.

Bring your room measurements, including doorways, and read how custom ordering works before you come in.

Frequently asked questions

What size is a king bedroom set?

The mattress is 76 by 80 inches, but the bed frame is larger. Most king frames on our site are about 79 to 83 inches wide and 86 to 90 inches long. With two nightstands, plan on about 11 feet of wall for the bed group.

Is a California king bigger than a king?

No. A California king is about 72 by 84 inches, 4 inches narrower and 4 inches longer than a king. The two cover almost the same area. Choose by room shape and by the height of the tallest sleeper.

What room size do you need for a king bed?

Measure the wall and the room length. A king bed with two 24-inch nightstands can take about 11 feet of wall, and a king frame plus a dresser across from it uses about 9 feet of length before any walking space. Tape the outline on the floor to check.

What pieces come in a king bedroom set?

Usually a bed, nightstands and a dresser with a mirror. All 68 bedroom collections on our site include those three, and 66 also include a chest of drawers or another tall chest. Armoires, lingerie chests and blanket chests are common extras.

Do king sheets fit a California king?

No. The two mattresses are different shapes, and the Better Sleep Council notes that regular king sheet sets won't fit a California king properly. Buy bedding for the size you choose.

Sources

• Better Sleep Council: Mattress Sizes
• Merriam-Webster: king-size
• Merriam-Webster: queen-size
• International Code Council: 2021 IRC R304.1 Minimum area
• International Code Council: 2021 IRC R304.2 Minimum dimensions
• Anchor It! (U.S. CPSC)
• Product pages on kingsamishfurniture.com (sizes, options and features as listed in November 2026)

How we made this guide: we counted the bed sizes, frame dimensions, collection pieces and mattress options listed on our product pages, read the mattress size guide, dictionary entries, building code sections and safety guidance above, and reviewed questions customers bring to our team. Every fact was checked against our product pages.