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Rain shower size: 20, 25 or 30 cm? How to choose the right one for your shower

How to choose between a 20, 25 and 30 cm Aquanello Eterna rain shower.

15Nov 2026
Rain shower size: 20, 25 or 30 cm? How to choose the right one for your shower

The right rain shower size depends on the size of your shower, where you stand and how the shower head is mounted. A 20 cm rain shower is ideal for a compact shower or a shower over the bath. A 25 cm shower fits comfortably in most showers, while a 30 cm shower provides the most enveloping, spa-like experience in a larger space.

Aquanello Eterna rain showers come in all three sizes, in stainless steel, matt black, brushed gold and brushed copper. Once you know the size, you can match the finish to the rest of your bathroom.

What difference does the size make?

A larger rain shower distributes water over a wider area. You stand in the middle of the water rather than under a narrow stream.

20 cm: compact and efficient

A 20 cm rain shower covers your head and shoulders well. It is the practical choice for a small shower, a shower over the bath, or if you mainly want a comfortable everyday shower.

25 cm: the all-rounder

A 25 cm rain shower provides noticeably more coverage without overwhelming a standard shower enclosure. For most bathrooms, this is the safe middle choice.

30 cm: the spa experience

A 30 cm rain shower is designed for larger showers and walk-in showers. The water covers more of your body at once, for a true spa experience.

How do I choose the right size for my shower?

Start with the space where you actually stand, not the size of the entire shower.

  1. Measure the space where you stand. Look at the space between the walls or the glass screen where you stand under the water.

  2. Leave room around the shower head. The rain shower should not touch or almost touch the walls or glass. Water hitting the glass can splash out of the shower.

  3. Think about who uses it. In a family bathroom, a 25 cm shower head works for both tall and shorter users.

  4. Check your water pressure. A larger shower head distributes the same amount of water over a wider area. If your water pressure is low, a 20 or 25 cm shower head often feels better than a 30 cm one.

A practical tip: before ordering, cut a 20, 25 or 30 cm circle out of cardboard and hold it where the shower head will be installed. You will immediately see how it fits in your space.

Wall arm or ceiling arm?

The rain shower is mounted on a shower arm, which you choose separately. The Aquanello Eterna wall-mounted shower arm, 39 cm positions the rain shower away from the wall. With the Aquanello Eterna ceiling arm, 25 cm, the water falls straight down from above. With a larger shower head, a ceiling arm or the long wall arm helps keep it centred above where you stand.

Which Aquanello Eterna rain showers are available?

Eterna rain showers are round, made of stainless steel and feature flexible EasyClean nozzles that make limescale easy to remove. They have a standard ½" connection and a 5-year warranty.

Prefer a complete set? Eterna concealed shower sets and Eterna thermostatic shower columns are also available with a 20, 25 or 30 cm rain shower. Explore the entire Aquanello Eterna series.

How do I keep the rain shower clean?

Rub the flexible EasyClean nozzles with your fingers occasionally to remove limescale. Clean the surface with a soft cloth and a mild cleaning product, and avoid scouring pads and harsh chemicals.

What are the most common mistakes?

  • Choosing a 30 cm shower head for a narrow shower, causing water to hit the walls and glass

  • Forgetting to order a shower arm, which is not included with the rain shower

  • Positioning the shower head above the edge of the shower instead of above where you stand

  • Choosing the largest size when water pressure is low

The right size, the right shower

Measure where you stand, consider your water pressure and choose an arm that directs the water to the right spot. Then your rain shower will feel just right every morning. Comparing different types of showers? Read rain shower or hand shower and our guide on how to choose the right shower head.

Rain shower size: 20, 25 or 30 cm? How to choose the right one for your shower
View the Aquanello Eterna rain showers

FAQ

What size rain shower head is best?

That depends on your shower. 20 cm suits compact showers, 25 cm suits most showers and 30 cm suits large showers or walk-in showers.

Is a larger rain shower head always better?

No. A large shower head in a small shower sprays against the walls and glass, and with low water pressure it may feel weaker.

Does the Eterna rain shower head come with a shower arm?

No. Choose a wall-mounted arm or ceiling-mounted arm separately, with a ½" connection.

What finishes are available?

Stainless steel, matt black, brushed gold and brushed copper.

How do I remove limescale from the nozzles?

Rub the flexible EasyClean nozzles with your fingers, then wipe the shower head with a soft cloth.

rain shower sizerain shower 30 cmrain shower headAquanello Eterna rain shower

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