Futon d’or tatami mats come in two formats: bed-size Boréal tatamis of 100 × 200 cm (39.4″ × 78.7″), sized so one mat covers a Twin shikibuton and two cover a Double, Queen or King, and traditional-proportion tatamis of 91 × 182 cm (the authentic Japanese 1:2 ratio). Half mats (100 × 100 cm) complete most layouts. Room sizes in Japan are still measured in tatami count: a 6-mat room is roughly 105 sq ft.
What are the standard tatami mat dimensions?
Futon d’or carries two tatami formats: traditional-proportion mats and Boréal bed-size mats designed to cover standard mattress sizes with fewer tatamis.
| Format |
Dimensions |
Thickness |
Designed for |
| Boréal bed-size tatami |
100 × 200 cm (39.4″ × 78.7″) |
5 cm |
Matching standard mattress and shikibuton sizes with the fewest mats |
| Boréal half tatami |
100 × 100 cm |
5 cm |
Completing layouts |
| Traditional tatami |
91 × 182 cm (2:1 ratio) |
5 cm |
Authentic Japanese proportions, full-room flooring |
How many Boréal bed-size tatamis for each shikibuton size
| Shikibuton size |
Dimensions |
Tatamis needed |
| Twin |
100 × 190 cm |
1 bed-size tatami |
| Double |
140 × 190 cm |
2 bed-size tatamis |
| Queen |
150 × 200 cm |
2 bed-size tatamis |
| King |
193 × 200 cm |
2 bed-size tatamis |
The difference between the two formats: traditional tatamis follow the authentic Japanese 2:1 proportion (91 × 182 cm) and shine when covering a whole room in the classic interlocking patterns. Boréal bed-size tatamis (100 × 200 cm) were sized so that one or two mats exactly frame a standard mattress: fewer mats, fewer seams under your futon, lower cost per bed.
Every Futon d’or tatami is made entirely of woven rice straw. No synthetic filling in the core, no solvents, no toxic additives. The rice straw is dried for months after harvest, heat-treated against parasites, and woven with traditional fabric borders; a canvas underside protects against humidity. Our tatamis are crafted by certified specialty manufacturers in Asia, where authentic rice-straw tatami are still made, and every mat is inspected in Montreal before delivery, backed by a 2-year warranty.
How thick is a tatami mat?
Futon d’or tatamis, bed-size and traditional, are 5 cm (2 inches) thick. A lighter folding tatami is also available for layering over existing floors or easy storage. Thickness affects firmness underfoot more than insulation: even a 3 cm mat isolates a futon from a cold floor.
How many tatami mats do I need for my room?
Work from the sleeping surface out:
- One sleeper (Twin shikibuton): 1 Boréal bed-size tatami (100 × 200 cm)
- Two sleepers (Double, Queen or King shikibuton): 2 Boréal bed-size tatamis side by side (200 × 200 cm)
- Full-room coverage: each bed-size tatami covers 2 m² (about 21.5 sq ft). Divide your room area to get the mat count, then adjust the layout so no four corners meet at one point, the traditional rule for both aesthetics and mat stability.
Can I put a tatami mat directly on any floor?
Yes. Tatami sits directly on hardwood, laminate, tile, or carpet with no frame required. On concrete or in humid basements, allow air circulation weekly by tilting the mats, as natural fibers absorb ambient moisture.
FAQ
What size tatami do I need for a queen futon?
Two Boréal bed-size tatamis side by side create a 200 × 200 cm surface that fully frames a queen shikibuton (150 × 200 cm). The same two-mat layout covers Double and King sizes.
Are all tatami mats the same size?
No. Japanese regional standards vary (Kyoto’s “Kyoma” mats are larger than Tokyo’s “Edoma”). Futon d’or carries two formats: Boréal bed-size tatamis (100 × 200 cm, sized to match standard mattresses) and traditional-proportion tatamis (91 × 182 cm).
Do you make custom tatami sizes?
Our tatamis come in fixed formats: bed-size (100 × 200 cm), half (100 × 100 cm), and traditional dimensions, designed so that standard mattress sizes are covered with the fewest mats possible. For non-standard spaces, combining full and half mats covers most layouts.
Browse our tatami mats and shikibutons, or read our guide How to Choose the Perfect Japanese Futon Mat.
