How to Choose a Poster Frame for Your Print Size
By Wall of Art | Published: 2026-10-19
Category: How-to Guides
Learn how to match a poster frame to your print size with this practical guide. Get answers to common questions about measuring, matting, and selecting the right frame.
Quick answer
To choose a poster frame, start by measuring your print's exact dimensions. Then decide whether you want a frame that fits flush or one with a mat that adds a border.
Why size accuracy matters
A frame that is even a few millimeters off can leave your poster looking crooked or loose. Always measure the printed area, not the paper edge, if your poster has a white border.
If you plan to add a mat, remember that the mat opening must be slightly smaller than the poster image so the artwork doesn't fall through.
Standard vs custom sizes
Many posters come in standard sizes like 21x30 cm or 50x70 cm, which makes finding a ready-made frame easy. But if your print is an unusual size, custom framing or a mat can help you use a standard frame.
For example, the '7.5.4 WOW' poster from K-W is available in 21x30, 30x40, 50x70, and 70x100 cm — all common sizes with plenty of frame options.
Frequently asked questions
- How do I measure my poster for a frame?
- Lay the poster flat on a clean surface. Measure the width and height of the printed image (not the paper edge if there is a white border). Write down the exact dimensions in centimeters or inches.
- Should I buy a frame that matches the poster size exactly?
- Only if you want the poster to fill the frame without a mat. If you plan to use a mat, buy a frame that is larger than the poster and order a mat with an opening that matches the image size. A mat adds a professional look and can help a smaller poster fit a larger standard frame.
- What if my poster size is not standard?
- You have two options: order a custom frame, or buy a standard frame slightly larger and use a mat to bridge the gap. Custom frames cost more but give a perfect fit. Mats are cheaper and add visual breathing room. Measure twice, order once — a mat is often the simpler solution.
- How thick should the frame be for a poster?
- For most posters, a frame with a profile thickness of 1-2 cm is sufficient. Thicker frames work well for large or bold posters, while thin frames keep the focus on the artwork. Match the frame thickness to the poster's visual weight — thin for minimalist, thick for bold.
Products mentioned
- 7.5.4 WOW: Available sizes: 21x30, 30x40, 50x70, and 70x100 cm. These are standard poster sizes, so you can easily find a ready-made frame that fits without custom work.
7.5.4 WOW - Persona: Abstract motif in gray metallic shades; available in multiple sizes. If you choose a non-standard size, you may need a custom frame or a mat to adapt it to a standard frame.
Persona - Cucumber: Poster with a minimalistic illustration; humorously titled 'Cucumber'. The playful design works well with a simple frame that doesn't distract from the artwork — a good example of matching frame style to poster personality.
