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Cultured Marble Shower Wall Panels: Stock Sizes, Cutting to Fit, and Finishing the Edges

Updated September 2026

Ella's cultured marble shower wall panels are molded in stock sizes rather than made to your exact wall dimensions, so trimming a panel on site is a normal part of the installation. The largest panel is 60 inches wide by 96 inches tall, side panels are molded 30, 32, 34 and 36 inches wide, and every panel can be cut with a masonry blade in a circular saw. Cut edges are then finished with caulk, or covered with a trim piece for a cleaner look.

Stock Panel Sizes

Because each panel comes out of a mold, the sizes are fixed at the factory. The back panel tops out at 60 inches wide by 96 inches tall. Side panels come in 30, 32, 34 and 36 inch widths so you can pick the size closest to your side walls. For the full list of wall products and their dimensions, see the wall kit sizes at a glance, and for how cultured marble compares to the acrylic kits and PVC tiles, see wall panels and surrounds for walk-in tubs.

Choosing the Right Size for Your Wall

Order the stock size that is equal to or slightly larger than the wall you need to cover, then trim off the excess. For example, a side wall that measures 29 inches deep is covered by the 30 inch side panel with 1 inch removed. A panel that is slightly oversized only needs a quick cut, while a panel that is too small cannot be stretched to fit.

  1. Measure each wall at the top, middle and bottom, and use the largest figure, since walls are not always square.
  2. Pick the stock width that meets or exceeds that figure for each side wall, and confirm the back wall is no wider than 60 inches.
  3. Note any windows, valves or niches that the panel must be cut around before you order.
  4. Confirm the selection with your Ella dealer or the team at (800) 480-6850 before placing your order.

Cutting the Panels

Cultured marble cuts with a masonry blade in a standard circular saw, which is the usual approach in the industry for this material. Support the panel fully on a flat surface, mark the cut line before cutting, and wear eye protection and a dust mask as you would for any masonry cut. Cutting is also part of fitting the pieces described in shower bases, walls and filler pieces.

Finishing Cut Edges and Covering Gaps

A cut edge does not need to be polished. The simplest finish is a bead of caulk along the edge, which can be painted over to match the wall. Where a more finished appearance is wanted, a 2 inch trim piece is applied over the edge. Ella carries only a few trim options: a 1 inch corner trim in 96 inch lengths that suits inside corners and the ceiling line, and a 2 inch by 3/4 inch flat trim that can cover the gap at the tub. A thicker 2 inch by 1 1/4 inch trim also exists, but it is often too thick for the joint at the tub. Ask your Ella dealer or the team at (800) 480-6850 which trims are current when you order.

Chapters in this video
  1. 0:00 Cultured Marble Shower Walls Ella's Bubbles presents cultured marble and travertine shower walls made from natural quartz and granite composite.
  2. 0:18 Multi-Piece Shower Surrounds Multi-piece shower surrounds are perfect for bathroom remodels and one person can carry and install them.
  3. 0:35 Custom Fit Panels The edges are factory finished for seamless panel joining but can be trimmed and cut for a custom fit.

Common Questions

Can the cultured marble panels be ordered in a custom size?
No, the panels are molded in fixed stock sizes. You order the size that meets or exceeds your wall dimension and cut it down on site. The largest panel is 60 by 96 inches, and side panels come 30 to 36 inches wide in 2 inch steps.
What kind of blade do I use to cut a cultured marble panel?
Use a masonry blade in a circular saw. Support the panel fully while you cut, and wear eye and breathing protection because the material produces fine dust.
How do I finish an edge after I cut a panel?
Run a bead of caulk along the cut edge, which can be painted to match, or cover the edge with a 2 inch trim piece. Trim gives the cleanest look at the tub deck and along a ceiling line.
My side wall is 29 inches deep, which panel do I order?
Order the 30 inch side panel and trim 1 inch from it. Always round up to the next stock width rather than down, since a short panel cannot be made larger.
Will the back panel cover a wall wider than 60 inches?
A single back panel is 60 inches wide at most. For a wider wall, discuss the layout with your Ella dealer or the team at (800) 480-6850 before ordering so the right pieces are selected.

Still Need Help?

Open a ticket at ellasbubbles.com/support or call (800) 480-6850 and have your model and serial number ready.

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