The size shower tray you need is the size of the space you’ve measured, not the size that sounds nice. Measure the floor area where the enclosure will sit, then pick the nearest tray dimension below it, allowing for the wall thickness and any pipework. For a tight en-suite, 760 x 760mm or 800 x 800mm square is the usual answer. For a walk-in, you’re looking at a rectangular tray from 1000 x 700mm up to 1400 x 800mm. Corner spaces want a quadrant.

That’s the short version. The rest of this guide covers the standard sizes, which shape suits which bathroom, how to measure properly, and the legs and plinth kits people forget about until the tray’s already on the floor.

• Standard shower tray sizes (and what fits where)
• How to measure for a shower tray
• Square shower trays: 760 x 760 and 800 x 800
• Rectangular shower trays: 1000 x 700 to 1400 x 800
• Best shower tray shape for a small bathroom
• Shower tray legs and raised plinths
• FAQ

Standard Shower Tray Sizes (and What Fits Where)

Shower trays come in standard dimensions, which is good news because the enclosure has to match the tray, not the other way round. Buy the tray first, then the enclosure to suit. Here’s how the common UK sizes break down by the space they’re built for:

• 760 x 760mm square. The smallest practical square. Cloakrooms, tight en-suites, awkward corners.
• 800 x 800mm square. The default “square shower” size. Comfortable enough for most adults, fits most compact and mid-sized bathrooms.
• 900 x 900mm square. A roomier square for when you’ve got the floor to spare.
• 1000 x 700mm rectangular. The entry walk-in. More length than a square without eating much width.
• 1200 x 800mm rectangular. A generous walk-in that suits a family bathroom.
• 1400 x 800mm rectangular. A proper walk-in length for a larger room.
• Quadrant (800 x 800mm and up). A curved corner tray that frees up the middle of the room.

If you’re replacing an existing tray, measure the old one before you assume anything. Bathrooms get re-tiled and re-plumbed over the years, and a tray that looks like an 800 can easily turn out to be a 760 once the silicone’s off. Browse the full shower trays range to see every size laid out by shape.

How to Measure for a Shower Tray

Get this wrong and nothing else matters. Measure the floor space the enclosure will sit in, wall to wall, at floor level, and because walls are rarely straight, measure in two or three places along each run and use the smallest reading. Measure low down, not at hip height, since skirting and out-of-true walls change the number near the floor. Three things people miss: the glass and frame sit on or just inside the tray edge, so the tray sets your enclosure size, not your room size; the tray’s waste outlet needs to line up with your existing soil pipe, and moving a waste is real work; and a hinged door needs clear space to open, which in a tight room can push you towards a sliding door or a quadrant.

If the numbers land between two sizes, size down. A tray that’s slightly too small can be packed and sealed; a tray that’s too big simply won’t go in.

Square Shower Trays: 760 x 760 and 800 x 800

Square is the go-to when the shower sits in a corner or a recess and you want a simple, predictable footprint. The two sizes that do most of the work are 760 x 760mm and 800 x 800mm, and the gap between them matters more than 40mm sounds.

The Shires 760 x 760mm Eco Stone Square Shower Tray at £109 is the one to reach for when space is genuinely tight, like a cloakroom corner or a small en-suite. It’s built from high-quality eco stone resin with a slim 30mm low profile design, which gives easier step-in access than the chunkier older trays. At 760mm it’s the smallest square most people can shower in comfortably, so don’t go smaller unless you have to.

Step up to the Shires 800 x 800mm Eco Stone Square Shower Tray at £119 and you get noticeably more elbow room for the sake of one extra width band. It’s the same eco stone resin, giving a strong, rigid structure with a premium feel underfoot, and the 800 x 800mm size is ideal for compact and mid-sized enclosures. Honestly, if your space takes an 800, fit an 800. The extra £10 buys a shower you won’t keep clipping your elbows in. Both feed straight into matching square shower trays and enclosures, so pairing the door and side panels is straightforward.

Rectangular Shower Trays: 1000 x 700 to 1400 x 800

Rectangular trays are for walk-ins and for any wall run that’s longer than it is deep. They give a proper showering area without forcing the enclosure to bulge into the room, which is why they suit modern bathrooms so well.

The Shires 1000 x 700mm Eco Stone Rectangular Shower Tray at £129 is the sensible starting point. Its slim 30mm low profile design gives a contemporary minimalist appearance, and the 1000 x 700mm size suits modern bathrooms and walk-in designs where you want more length than a square but can’t spare the width. It’s the natural step up from an 800 square when your space is narrow but long.

At the other end, the Shires 1400 x 800mm Eco Stone Rectangular Shower Tray at £179 is a generous walk-in length for a larger bathroom. Same high-quality eco stone resin, same slim 30mm low profile, just a lot more room to actually move under the water. If you’ve got the floor for it, a 1400 x 800 walk-in feels like a different class of shower to a cramped square.

The popular 1200 x 800mm size sits between those two and is one of the most searched dimensions going. If you want it as a straight rectangle, you’ll find it in the rectangular shower trays range. If your 1200 x 800 space is in a corner, the offset quadrant in the next section is often the smarter choice.

Best Shower Tray Shape for a Small Bathroom

In a small bathroom, shape beats size. A quadrant tray has a curved front and sits in the corner, so it tucks the shower out of the way and leaves the middle of the room clear. That curve is the difference between a bathroom you can walk through and one where you shuffle past the glass every morning.

The Shires 800 x 800 Stone Quadrant Shower Tray at £119 is the obvious pick. Its quadrant shape makes it an excellent choice for corner installations where space efficiency matters, and the low-profile design keeps the step-in height down. It gives a usable 800mm shower without jutting into the room the way a square does.

If a premium finish is on your mind, the Kstone 800 x 800 Quadrant Shower Tray at £189 does the same corner-saving job with a smooth, easy-clean surface and a more premium finish. Same shape, same floor saving, just a step up in quality.

For a bigger corner, look at the Kudos Kstone 1200 x 800 Offset Quadrant Shower Tray (Right Hand) at £239. The offset quadrant profile creates a spacious showering area while still optimising floor space, and it’s built from a reinforced material with a smooth, easy-clean surface. It’s the answer for anyone who wants the room of a 1200 x 800 but the floor-freeing curve of a quadrant. Note it comes handed, so check whether you need right or left before you order. The full quadrant shower trays range has both standard and offset options.

One caveat: a quadrant suits a corner. If your shower goes along a single straight wall, a square or rectangular tray uses the space better. Shape follows the wall layout, not fashion.

Shower Tray Legs and Raised Plinths

Here’s the bit that catches people out after the tray’s chosen. A slim low-profile tray sits almost flat on the floor, which looks great, but it leaves nowhere for the waste pipe to run unless your waste already drops below floor level. If it doesn’t, you raise the tray on legs and hide the gap with a plinth. This is also how you level a tray on an uneven floor, and no bathroom floor is ever quite as level as you’d hope.

For a square or rectangular tray, the Square & Rectangular Shower Tray Legs & Plinth Riser Pack at £79.99 does both jobs. The pack includes front and side PVC fascia for a clean finish, plus adjustable legs that let you set the tray height, and it suits trays up to 1700mm long. That covers everything from a 760 square up to a 1400 x 800 walk-in.

For a curved tray, you want the matching Quadrant Shower Tray Legs & Plinth Riser Pack at £69.99. It includes adjustable legs to level the tray on uneven floors and a plinth riser panel to neatly conceal the underside, made from durable, corrosion-resistant materials. A square plinth won’t follow the curve of a quadrant, so match the kit to the tray shape. One thing to remember: raising a tray on legs pushes the step-in height up, so factor that in if anyone using the shower has limited mobility. You’ll find both kits in the tray riser kits range.

Frequently Asked Questions

What size shower tray do I need?

Measure the floor space at floor level, in two or three spots along each wall, then pick the nearest standard tray size below your smallest reading. For a tight corner that’s usually 760 x 760mm or 800 x 800mm square; for a walk-in it’s a rectangular tray from 1000 x 700mm up to 1400 x 800mm. When you’re between sizes, size down.

What is the most common shower tray size?

For square enclosures, 800 x 800mm is the most common and most comfortable compact size. For walk-ins, 1200 x 800mm is the popular choice. The 760 x 760mm square is the go-to when space is genuinely tight, like a cloakroom or small en-suite.

Is an 800 x 800 shower tray big enough?

For most adults, yes. An 800 x 800mm tray gives enough room to shower comfortably and suits most compact and mid-sized bathrooms. If your space takes an 800 rather than a 760, fit the 800; the extra width makes a real difference for very little extra cost.

What shape shower tray is best for a small bathroom?

A quadrant. Its curved front sits in the corner and frees up the middle of the room, so a small bathroom feels less boxed in. An 800 x 800mm quadrant gives a usable shower without jutting into the floor space the way a square does. Quadrants only work in a corner, though; for a straight wall run, stick with square or rectangular.

Do I need legs and a plinth for my shower tray?

You need them if your waste pipe runs above floor level, because a low-profile tray sits too flat to fit the waste underneath otherwise. Legs and a plinth raise the tray to clear the pipework, let you level it on an uneven floor, and hide the gap with a tidy fascia. Match the kit shape to the tray: a square and rectangular kit for straight trays, a quadrant kit for curved ones.

How high should a shower tray be off the floor?

Modern slim trays are around 30mm tall and sit close to the floor for easy step-in. Raise one on legs to run the waste and the finished height goes up, often to somewhere around 100 to 150mm depending on the kit and how you set the adjustable legs. Keep that step-in height in mind if anyone using the shower has limited mobility.

Once you’ve settled on a size and shape, the full shower trays range has every option in one place. Leaning towards a corner setup? Our quadrant shower trays buying guide goes deeper on the shape, and the quadrant corner enclosure guide covers the glass on top. Building a small bathroom from scratch? Our guide on how to design a small bathroom ties the layout together, and if you fancy going screen-free, whether a walk-in shower is right for your bathroom is worth a read.