Published 2026-08-12 · Updated August 12, 2026
Quick answer: Measure your door's width and buy a mat about 80% of it. A standard 36" single door wants 18"×30" or 21"×35". A double door or a wide entry wants 24"×35". Anything under 16" wide reads as a bath mat that wandered to the wrong room.
Doormat sizing looks like it should not need a guide, and then you get the mat home, put it down, and the door either scrapes it on every swing or the mat sits marooned in the middle of a slab of concrete looking half the size it did in the photo. Both problems come from the same place: buying by eye instead of by the two numbers that decide it.
The two measurements
Door width tells you how wide the mat should be. Threshold clearance — the gap between the bottom of the door and the floor — tells you whether the door will clear the mat when it opens inward. Take both before you shop. They take thirty seconds and they settle the whole decision.
The 80% rule
A doormat should be roughly 80% of the door's width. Not the full width: a mat that runs edge to edge makes the door look narrower than it is and leaves no margin for the frame. Not half: a mat that stops well short of the handle side reads as an accident. Eighty percent is the proportion that looks deliberate from the street, which is the only distance most people ever judge it from.
The standard American front door is 36" wide. Eighty percent of that is about 29", which is why 18"×30" and 21"×35" are the two sizes that suit the most houses in the country. If your door is 32" — common in apartments and older terraces — drop to the smaller of the two.
The five sizes, and who each one is for
- X-Small, 16"×24" — $36.99. Apartment landings, back doors, side doors, and the narrow half of a French pair. Also the sensible choice where a fire door has to swing over the mat.
- Small, 15"×25" — $39.99. Worth reading twice: Small is narrower and longer than X-Small, not simply bigger. It suits a deep, narrow step — a stoop with more front-to-back room than side-to-side.
- Medium, 18"×30" — $44.99. The default. If you have a standard single front door and you do not want to think about it, this is the one.
- Large, 21"×35" — $54.99. A 36" door with a generous porch, or any entrance where two people arrive at once and both need somewhere to put their feet.
- X-Large, 24"×35" — $59.99. Double doors, sliding patio doors, wide farmhouse entries, and garage-to-kitchen doors where the whole household funnels through one point.
Every design in the doormat collection prints in all five, so choosing a size never costs you the design you wanted.
The clearance problem, and how to avoid it
Doors that open inward are the ones that catch. A printed flat mat is thin — that is the point of flat print — but "thin" is not "zero", and a door with a tight threshold will drag. If your clearance is under half an inch, put the mat outside the door rather than inside it, or move to a storm-door setup where the outer door swings out. Our companion piece on indoor versus outdoor mats covers which one belongs where.
Two doors, one design
Where a house has a front door and a back door, the tidy answer is the same design in two sizes: Medium at the front, X-Small at the back. It costs less than two separate decisions and the house reads as though someone planned it. The same logic runs through the seasonal rotation — one size decision, reused every time the design changes.
When a doormat is the wrong product
If what you actually want is coverage down a hallway rather than a landing pad at the door, you want a runner, not a mat. Runners start at 20"×60" and go to 35"×106"; the hallway runner sizing guide handles that case properly. And if the entrance opens straight into a living space with no hall at all, read entryway rug ideas before buying anything — the shape of the entrance matters more than the size of the door.
Doors that do not follow the rules
- French doors. Treat them as one wide opening, not two narrow ones. A single X-Large across the pair looks composed; two Mediums side by side look like a mistake nobody corrected. If only one leaf is ever used in practice, centre a Medium on that leaf instead and leave the other bare.
- Sliding patio doors. The opening is wide and the door never swings, so clearance is a non-issue and you can go as large as the run allows. X-Large is the usual answer.
- Arched or oversized front doors. Measure at the widest point of the actual opening, not the frame, and apply the same 80%. Grand doors tempt people into oversized mats; the proportion rule still holds and still looks better.
- Doors at the top of steps. Where the landing is shallower than the mat is deep, the mat overhangs the top step — a genuine trip risk. Measure the landing depth first and let it cap your size, even if that means dropping below the 80% width.
Before you order
Measure the door. Take 80%. Check the clearance. Pick the closest of the five sizes, and if you land exactly between two, take the smaller one — a mat that is slightly small looks understated, and a mat that is slightly large looks like a mistake. For everything else in the house, the full rug sizing guide covers the rooms a doormat never reaches.