Snooker Ball Sizes Explained: 2-1/16" vs 2-1/4" (and Pool vs Snooker Balls)

Snooker ball sizing confuses a lot of players, and for good reason: "snooker balls" are sold in two common diameters, and they are noticeably smaller than the American pool balls most North American players grew up with. Getting the size right matters — it changes how the game plays, whether the balls fit your table's pockets, and whether a set is right for casual play or serious practice. This guide breaks down every size, explains how snooker balls differ from pool balls, and helps you choose the correct set.

Quick answer: Regulation snooker balls measure 2-1/16 inches (52.5 mm) in diameter. American pool balls are larger at 2-1/4 inches (57.2 mm). A full snooker set contains 22 balls — 15 reds, 6 colours, and 1 cue ball. If you own a standard American pool table and want balls that suit its larger pockets, choose the oversized 2-1/4" snooker set; if you play on a true snooker table or want tournament feel, choose the 2-1/16" regulation set.

Snooker ball sizes at a glance

Unlike American pool, where 2-1/4" is the near-universal standard, snooker sets are offered in more than one diameter to suit different tables. Here are the sizes you will encounter:

Ball type Diameter (inch) Diameter (mm) Best for
Regulation snooker 2-1/16" 52.5 mm Full-size snooker tables, tournament practice
Oversized snooker 2-1/4" 57.2 mm American pool tables with larger pockets
American pool (for comparison) 2-1/4" 57.2 mm 8-ball, 9-ball, standard pool tables

The gap between 52.5 mm and 57.2 mm looks tiny on paper — under 5 mm — but on the table it is very visible. Side by side, a 2-1/16" snooker ball looks almost like a marble next to a 2-1/4" pool ball, and the difference is enough to change how the balls behave in the pockets.

What is in a full snooker set?

A complete snooker set has 22 balls:

  • 15 red balls (each worth 1 point)
  • 6 colours — yellow (2), green (3), brown (4), blue (5), pink (6), and black (7)
  • 1 white cue ball

This differs from a standard American pool set, which contains 16 balls: seven solids, seven stripes, the 8 ball, and a cue ball. If you are shopping for snooker, always confirm the set includes all 22 balls and a matching cue ball.

Snooker balls vs. pool balls: the real differences

Size is the headline difference, but it is not the only one. Here is how the two compare:

Diameter and weight

Snooker balls (2-1/16") are smaller and lighter than American pool balls (2-1/4"). The smaller mass and diameter reward touch and precise cue-ball control, which is central to the snooker game.

Number of balls and colours

Snooker uses 22 balls with a points-based colour system; American pool uses 16 numbered solids and stripes. The two are not interchangeable for their respective games.

Material

Quality balls of both types are made from cast phenolic resin, prized for its durability and consistent roll. Budget sets sometimes use polyester or acrylic, which can wear and lose their true shape faster. For a set you will play often, phenolic resin is worth the extra cost.

Pockets and table fit

Snooker tables have tighter, rounded pockets built for smaller balls, while American pool tables have wider pockets. This is exactly why the oversized 2-1/4" snooker set exists — it lets you play snooker-style games on a standard pool table without the balls rattling around in pockets that are too big for regulation snooker balls.

Can you use snooker balls on a pool table?

Yes — but the experience depends on which snooker balls you use:

  • Oversized 2-1/4" snooker balls match the diameter of American pool balls, so they suit a standard pool table's pockets and cushions well. This is the set to choose if you want to play snooker on an American pool table.
  • Regulation 2-1/16" snooker balls will physically roll on a pool table, but the smaller balls sit lower against wider pockets and cushions, which changes the feel and can make pockets play "loose." They are best reserved for a proper snooker table or English-style tables.

The reverse — using 2-1/4" American pool balls on a regulation snooker table — is not recommended, because they are too large for snooker's tighter pockets.

Which snooker ball set should you buy?

Match the set to your table and your goals:

Whatever you choose, buy a set with a matching cue ball and good-quality resin balls — mismatched or worn balls are one of the most common reasons a home table feels "off."

Frequently asked questions

What size are regulation snooker balls?

Regulation snooker balls are 2-1/16 inches (52.5 mm) in diameter. This is the size used on full-size snooker tables and in tournament play.

Are snooker balls smaller than pool balls?

Yes. Regulation snooker balls (2-1/16" / 52.5 mm) are smaller and lighter than American pool balls (2-1/4" / 57.2 mm). The roughly 5 mm difference is easy to see when the two are side by side.

How many balls are in a snooker set?

A full snooker set has 22 balls: 15 reds, 6 colours (yellow, green, brown, blue, pink, black), and 1 white cue ball.

Can I play snooker on my pool table?

Yes. For the best fit on a standard American pool table, use an oversized 2-1/4" snooker set so the balls suit the table's wider pockets. Regulation 2-1/16" balls will work but will feel different because they are smaller than the table was designed for.

What are snooker balls made of?

Quality snooker and pool balls are made from cast phenolic resin, which holds its shape and rolls true over years of play. Cheaper polyester or acrylic balls wear faster and are better suited to occasional use.

The bottom line

Snooker balls come in two common diameters — 2-1/16" (52.5 mm) regulation and 2-1/4" (57.2 mm) oversized — while American pool balls are 2-1/4". Pick the regulation size for a true snooker table and the oversized size for a standard pool table, and always buy a full 22-ball set with a matching cue ball in durable phenolic resin. Browse the Aska Billiards ball collection to find the set that fits your table.

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