How to Measure and Order a Custom Mirror: Simple Guide for Homes and Gyms

Whether you are upgrading a hallway, designing a home gym or fitting a bespoke bathroom mirror, ordering a custom cut-to-size mirror ensures a perfect fit. This guide explains how to measure correctly, choose the right thickness and avoid the most common mistakes homeowners make.

Step-by-Step: How to Measure for a Custom Mirror

1. Measure the Width and Height

Measure from edge to edge of the space where the mirror will be placed. Take three measurements horizontally and vertically to check for uneven walls, which are very common in UK homes.

2. Allow for Tolerances

Because most walls are not perfectly square, leave a 2–3mm tolerance on each side. This ensures the mirror will fit without forcing or damaging the edges.

3. Mark Socket, Switch and Fitting Locations

If the mirror is going above a vanity or near lighting, note the exact positions of sockets, shaver points and switches so installers can cut precise openings if needed.

4. Measure the Correct Height for Gym Mirrors

Gym mirrors should sit above skirting boards but low enough to allow full-body visibility. Most gym installations place the bottom of the mirror 20–40mm above the skirting line.

Choosing the Right Mirror Thickness

4mm Mirror

Suitable for small mirrors, bathrooms and decorative wall pieces. Lightweight and budget-friendly.

6mm Mirror

Recommended for larger mirrors, hallways, home gyms and commercial settings. Thicker glass reduces flex and offers better clarity with fewer distortions.

Edge Options

• Polished edges: Clean, modern finish suitable for most applications
• Bevelled edges: Premium, decorative look often used in hallways and living rooms
• Framed mirrors: Ideal for statement pieces and interior styling

Gym Wall Mirror Tips

1. Safety Backing

Always use safety-backed mirrors in gyms. The backing prevents the mirror from shattering into sharp pieces if accidentally impacted.

2. Correct Fixings

Large or heavy mirrors require high-strength adhesive or mechanical fixings. For gym installations, adhesive alone is rarely enough without proper preparation.

3. Spacing and Alignment

Gym mirrors are usually installed just above skirting boards. Ensure panels line up perfectly, especially when multiple mirrors are placed side by side.

Ordering Your Custom Mirror

When placing an order, always provide accurate measurements, preferred thickness, edge type and any additional requirements such as socket cut-outs or safety backing.

If you’re planning a full home gym installation, explore our mirror splashback options, which use the same toughened glass technology ideal for high-intensity settings.