Mahjong tile design has run through four manufacturing phases: hand-carved bone on a bamboo back, the early plastics of the 1920s export craze, post-war injection moulding, and today’s acrylics and weighted composites. What changed each time was the technology and the customer, never the artwork – three suits, four winds, three dragons and a few bonus tiles have survived a century and a half essentially unaltered.
That stability is what makes dating a set possible: because the pictures barely move, how a tile was made carries almost all the evidence about when and for whom it was built.
Five minutes with a set tells you its era
Start here, before any history. Pick up one tile, then open the box: four checks place almost any set within a couple of decades.
- Feel it, then drop it. Bone is cool and faintly porous, celluloid is warmer and lighter than it looks, and modern melamine is dense with a higher-pitched clack when it lands.
- Check the corners. Latin letters and Arabic numerals mean a set built for an export market, so the 1920s at the earliest.
- Count everything. 144 points to China, 136 to Japan, 152 with jokers to the United States.
- Open the case. Dovetailed wooden drawers suggest the 1920s, vinyl clamshells the 1960s and 1970s, and moulded plastic trays anything recent.
Materials, and the tells that come with them
Manufacturing method dates a set far more reliably than artwork does, because the artwork was copied faithfully from one generation of makers to the next.
| Era | Approximate period | Materials | How the face was made | Giveaway signs |
|---|---|---|---|---|
| Bone and bamboo | 1870s-1920s | Bone face joined to a bamboo back | Hand-carved, then filled with pigment | Visible join between two materials; fine pores in the bone |
| Early plastics | 1920s-1940s | Celluloid, casein, Bakelite and Catalin | Carved or pressed, hand-painted fills | Warm cream and amber tones; faint chemical smell; Art Deco cases |
| Mass moulding | 1950s-1990s | Melamine, ABS, polystyrene | Engraved and paint-filled, later pad-printed | Uniform tiles, a moulding seam, bright white faces |
| Contemporary | 2000s-present | Acrylic, resin, weighted composites, revived bamboo | Laser engraving, screen printing, custom typefaces | Pastel palettes, colour-coded suits, weighted cores |
Why hand carving gave way to moulding
The classic antique tile is two materials doing two different jobs. Bamboo forms the back because it is light and springy enough to survive being slammed onto a hard table for decades; bone forms the face because it takes a clean carved line and holds pigment in the groove.
The halves were pinned or dovetailed together, a carver cut each character by hand, and pigment was rubbed into the cuts. Antique tiles therefore never match perfectly: variation in stroke weight is a signature of the period rather than a fault.
Injection moulding, which reached tile production after the Second World War, removed that variation along with most of the cost. The craft question stopped being how well a carver worked and became which polymer a factory bought.
Ivory, bone, and a legal problem
Ivory sets existed at the luxury end of the trade, and they are why so many plain bone sets get misidentified in estate sales. The test is the grain: bone shows tiny dark pores where blood vessels ran, ivory faint cross-hatched Schreger lines.
The distinction now matters legally as well as historically. International commercial trade in elephant ivory has been banned since the African elephant was moved to Appendix I of CITES in October 1989, a decision Wikipedia’s account of the ivory trade dates into force in January 1990, and several countries including Australia have since tightened their domestic markets, so an ivory set is more paperwork than prize. For the symbolism those early carvers were reproducing tile after tile, see our guide to what the suits, winds and dragons mean.
The export boom that put letters in the corner
Mahjong turned into a Western fashion object almost overnight in the early 1920s. The American businessman Joseph Park Babcock published a simplified English rulebook, Rules of Mah-Jongg, in 1920, as Wikipedia’s article on mahjong records; importers shipped sets in volume behind him.
Supply could not keep up. With neither enough bone nor enough skilled carvers, manufacturers moved to the new plastics – celluloid and casein first, then Bakelite and Catalin – which pressed and cut far faster than bone.
The same decade produced the small marks in the corner of many Western tiles. Importers asked for Arabic numerals and Latin letters so a beginner could tell a five of characters from a five of bamboo without reading the script – a commercial decision still printed on millions of tiles. Presentation shifted too: sets arrived in lacquered Art Deco cases with sliding drawers, sold as furniture as much as a game. Our history of mahjong follows how the game travelled, and its visual afterlife runs through how artists have depicted mahjong since.
Three standards that never merged
Cheap moulding let each playing tradition harden into its own set specification, which is why tiles from Osaka, Hong Kong and New Jersey are not interchangeable.
| Tradition | Tiles in a full set | Extras | Typical tile size | Design cues |
|---|---|---|---|---|
| Chinese (mainland and Hong Kong) | 144 | 4 flowers and 4 seasons | Quoted as a size number, commonly 32 to 48 | Green or blue backs, bold engraved characters |
| Japanese riichi | 136 | Red fives | Compact and closely standardised | Cream backs, sized for automatic shuffling tables |
| American (National Mah Jongg League) | 152 | 8 jokers on top of a standard 144 that already includes 8 flowers | Larger faces, sized to sit on racks | Latin letters and numerals in the corners |
The American count surprises people: a set built for the annual hands card published by the National Mah Jongg League, which issues a new card every year, is the standard 144 tiles plus eight jokers. The flowers are part of that 144 rather than something the jokers replace. Japanese sets go the other way and drop the bonus tiles, leaving the 136 of riichi mahjong.
What a size number actually measures
Chinese sets are sold by a size number – Size 32, Size 40, Size 44 – and the figure is a millimetre measurement of the tile itself, so a bigger number means a physically bigger tile. It is a trade convention rather than a published standard, and makers do not all quote the same dimension, so check the stated measurements before assuming two sets will match.
What the number does tell you reliably is scale, and scale changes how a set plays. Bigger tiles read more easily across a dining table; smaller ones shuffle faster and are kinder on the wrists. Our own hire set is a Size 40 green-backed Chinese set with the full 144 tiles, picked because it stays readable from the far seat. Hire runs A$20.00 to A$43.75 by weekday or weekend and duration, with Greater Sydney delivery or Wolli Creek pickup on the mahjong set and table hire page.
What today’s designers optimise for
- Legibility. High-contrast fills, corner indices and colour-coded suits let mixed-ability groups play without squinting.
- Weight and sound. A weighted core gives a tile the heft that makes shuffling feel right.
- Durability. Hire and parlour sets absorb thousands of shuffles a year, so chip resistance beats delicacy.
- Automatic tables. Riichi tiles built for shuffling tables carry a magnetic element and cannot be mixed with ordinary ones.
- Aesthetics. Pastel and designer sets treat the tile as an interior object, photographed as often as played with.
Five ways people wreck an old set
- Assuming bone is ivory. Most “ivory” sets in circulation are bone or early plastic, and the pores give it away.
- Cleaning with solvents. Alcohol, acetone and bleach strip pigment from carved fills and craze early plastics. A barely damp cloth and a dry buff is the whole method.
- Soaking tiles. Water works into the bone-and-bamboo join and lifts the halves apart.
- Heat and sunlight. Celluloid discolours and warps, and old cellulose nitrate is flammable. Store vintage sets cool, dry and shaded.
- Topping up from another set. Size, back colour and engraving depth differ between makers, so a substituted tile shows from across the room.
Playing with tiles you do not have to insure
Design matters most when a set has to work for people who have never played, which is exactly when a fragile heirloom is the wrong object to put on the table. We hire out complete sets, tables and stools across Greater Sydney and clean everything between bookings; the replacement fee on a lost tile exists for the reason this article keeps returning to, that a matched engraved set cannot be repaired one tile at a time. If you would rather own something, the mahjong merchandise range is made to order and ships Australia-wide in two to three days.
Tile questions collectors and hosts ask
Are antique mahjong tiles made of ivory?
Almost all are bone, usually ox or cattle bone bonded to a bamboo back. Ivory sets were a luxury minority, and since the CITES ban on international commercial ivory trade took effect in January 1990 they are difficult to sell or ship legally.
Why do some tiles have letters and numbers in the corner?
Those indices were added for Western buyers during the 1920s boom so that new players could identify a tile without reading Chinese characters. They have no function in play and are absent from most Chinese and Japanese sets.
How many tiles should a complete set have?
144 for a Chinese set including flowers and seasons, 136 for a Japanese riichi set, and 152 for an American set, which is the standard 144 plus eight jokers. Counting the tiles is the fastest way to identify an unlabelled set.
What does Size 40 mean on a Chinese set?
It is a millimetre size number for the tile, so a Size 40 tile is physically larger than a Size 32. Size numbering is a trade convention rather than a formal standard and makers do not all quote the same dimension, so treat it as a guide to how the tiles will feel and check the actual measurements if two sets need to match.
Do heavier tiles actually play better?
Heavier tiles stack more securely and sound better, which is why serious players prefer them. The trade-off is fatigue over a long session, so hire and club sets usually sit mid-range.
Can I replace a lost tile from another set?
Almost never convincingly. Size, back colour, engraving depth and paint tone vary between makers and runs, so a substituted tile is identifiable to anyone at the table – and a tile you can recognise from the back changes the game.
Looking for a set of your own? See our mahjong merchandise, or rent a full setup to try one first.
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