Custom Size Extra Thick Mount
Price range: £7.40 through £27.80
Our extra thick mounts are cut from 3.5mm thick (3500 micron) whitecore acid free mount card, as opposed to standard mounts, which are only 1.4mm or in some cases thinner.
• Extra Thick 3.5mm (3500 micron) Whitecore Mount.
• Conservation-Quality & Acid-Free – Prevents yellowing and protects artwork over time.
• Custom Size – enter your measurements for a bespoke mount.
• Ideal for Framing & Display – Perfect for exhibitions, home decor, galleries, and gifts.
• Multiple Colour Options – Available in 7 colours, including classic white, black, and cream.
• Made to Order in the UK – Hand-cut with precision for a perfect fit.
Please choose your size category (based on the outside measurements of the mount), and whether you would like to order just the mount, or a mount, backing mount and cello wrap (B&C) from the drop down menu. Please note: the backing mount will be of standard thickness 1400 mount card. The cello wrap will come as a bag closest to the mount size, with any excess cello easily taped on the back for presentation.
Enter your custom outside size and aperture size in the personalisation instructions. Please ensure you have read the measurement instructions below before placing your order.
Description
How to Measure for Your Custom Mount
1. Measuring the Mount (Outside Size)
• Always measure from the back of your frame, not the visible glass at the front. This means measuring the backboard or glass size. The visible front glass is smaller due to the frame rebate, so don’t measure that.
2. Measuring the Aperture (Window Size)
• The aperture is the opening in your mount that shows your artwork.
• Your image should overlap the aperture by about 3mm on each side so it stays in place.
Example: A 20 cm × 20 cm image needs an aperture of 19.4 cm × 19.4 cm.
• Make sure to calculate the exact aperture size before ordering.
3. Bottom Border “Weighting”
• When a framed picture with equal borders is hung, an optical illusion called foreshortening can make the bottom border look narrower.
• To fix this, it’s common to add 0.5 cm extra to the bottom border. If you want this adjustment, please indicate “weighting” in the personalisation options.
• If you don’t request it, your aperture will be centered
Tips for an accurate order:
• Always double-check your measurements.
• Measure the back of your artwork or backing board, not the front.
• Decide if you want weighting for a visually balanced look.

Additional information
| Outside mount size category | Up to 10"x8" Outside Size, Up to 10"x8" Outside Size (with back and cello wrap), Up to 12"x10" Outside Size, Up to 12"x10" Outside Size (with back and cello wrap), Up to 14"x11" Outside Size, Up to 14"x11" Outside Size (with back and cello wrap), Up to 16"x12" Outside Size, Up to 16"x12" Outside Size (with back and cello wrap), Up to 20"x16" Outside Size, Up to 20"x16" Outside Size (with back and cello wrap), Up to A2 Outside Size, Up to A2 Outside Size (with back and cello wrap), Up to 20" x 28", Up to 20" x 28" (with back and cello wrap) |
|---|---|
| Colour | Bright White 308001, Ivory 308043, Hayseed 308065, Cream 308213, Photo White 308278, Minuet 308627 |









