Dimensions and versions
| Outside Ø | Volume | Height, 20 litres |
|---|---|---|
| 235 mm | 6 · 10 · 15 · 20 litres | 568 · 570 · 579 mm |
| 237 mm | 10 · 15 · 20 litres | 560 or 568 mm |
| 239 mm jacketed | 10 · 15 · 20 litres | 560 mm |
| 250 · 278 · 309 mm | Special shapes, rarely in circulation | – |
Figures from the current data sheets of three manufacturers, September 2026. Within one series height and weight vary slightly – when in doubt, measure or ask.
Two diameters are common, the rest is the exception
Unlike DIN and EURO, the slim shapes have no single standard diameter. In practice almost every slim keg comes down to two figures: 235 and 237 mm. Jacketed versions have an outside diameter of 239 mm, because the plastic jacket adds to it. The diameters 250, 278 and 309 mm do appear in the manufacturers’ catalogues, but you rarely meet them in daily work.
Measure before ordering any spare part – the Keg identifier does the looking-up for you.
Eight millimetres that get in the way when stacking
The real stumbling block is the height. The 20-litre version at 237 mm diameter is offered by one and the same manufacturer in two heights: 560 and 568 mm. At 235 mm it is 570 mm, and the stackable 20.4-litre variant measures 579 mm.
Mixing such kegs on one pallet gives you no level layer: the stack rests on the tall kegs, the shorter ones carry nothing, and the top layer wobbles. When buying used kegs it is therefore worth looking at the height, not only at diameter and volume.
The advantage and the catch
Slim kegs fit into fridges and cramped bar areas where a EURO keg will not stand. That very geometry has a downside, though: less head space at the same volume. If such a keg heats up badly in transport or storage, the internal pressure rises faster than in a wide keg – until the fitting seal gives way.
A study by TU Munich examined exactly this case and ruled out overfilling as the cause: the carbon dioxide content was normal. It was the shape in combination with the transport route. The keg shape is a logistics decision, not a purchasing decision. The whole case in the blog.
In what condition?
We supply every shape factory-new and reconditioned. Technically the two are equivalent – the difference lies in price and availability. What happens in a complete overhaul.