Choosing the right picture frame size sounds simple—until you're standing in front of dozens of options wondering whether you need an 8×10 frame, an 11×14 frame with a mat, or a completely custom size.

This guide explains everything you need to know about standard picture frame sizes, including:

• Common photo frame sizes
• Artwork and poster sizes
• Certificate and diploma sizes
• Mat board sizing
• Frame outside dimensions
• When you need custom framing

Whether you're framing family photos, artwork, posters, certificates, or original paintings, this guide will help you choose the correct frame the first time.

Quick Reference: Standard Picture Frame Sizes

What Does Frame Size Actually Mean?

One of the biggest misconceptions is that a frame's listed size refers to its outside dimensions.

It doesn't.

An 11 × 14 frame is designed to hold 11 × 14 artwork.

The outside dimensions depend on:

• frame moulding width
• mat board (if used)
• frame profile

For example:

Artwork:
11 × 14

Frame:
11 × 14

Outside dimensions:
approximately 12½ × 15½ inches (depending on moulding)

This is why measuring your wall space based only on the listed frame size often leads to surprises.

Most Popular Picture Frame Sizes

4 × 6

The classic photo size.

Perfect for:

• vacation photos
• family snapshots
• tabletop frames
• gifts

5 × 7

One of the most popular portrait sizes.

Often used for:

• wedding photos
• graduation pictures
• family portraits

8 × 10

Professional photographers frequently print in 8×10.

Ideal for:

• portraits
• pet photography
• certificates with mats

11 × 14

One of the most versatile wall art sizes.

Works well for:

• photography
• illustrations
• artwork
• limited edition prints

Many people use an 11×14 frame with an 8×10 mat opening.

16 × 20

A favourite for:

• wedding photography
• family portraits
• large artwork

Large enough to create a focal point without overwhelming a room.

18 × 24

Common for:

• posters
• architectural prints
• maps
• graphic art

24 × 36

The standard size for many movie posters and large art prints.

Because of its size, acrylic glazing is often preferred over glass due to its lighter weight and improved safety.

Standard Poster Sizes

Many posters benefit from custom framing with a mat to create a more finished appearance.

Standard Certificate Sizes

Common certificate sizes include:

Universities often issue diplomas in unique dimensions, making custom framing the best solution.

Standard Canvas Sizes

Common stretched canvas sizes include:

• 8 × 10
• 11 × 14
• 12 × 16
• 16 × 20
• 18 × 24
• 24 × 30
• 24 × 36
• 30 × 40
• 36 × 48

Floating frames have become one of the most popular ways to display canvas artwork.

Standard Picture Mat Sizes

Adding a mat changes the visual presentation while keeping the artwork the same size.

Examples:

Mats help:

• draw attention to artwork
• create visual balance
• protect artwork from touching the glazing
• provide a more gallery-like appearance

When Standard Sizes Don't Work

Not every piece of artwork fits a standard frame.

Common examples include:

• original paintings
• panoramic photography
• concert posters
• sports jerseys
• diplomas
• antique artwork
• family heirlooms
• children's artwork

In these situations, custom framing allows you to choose:

• exact dimensions
• moulding style
• mat colour
• acrylic type
• mounting method

Why Acrylic Instead of Glass?

At Custom Frames Canada, we use high-quality acrylic rather than glass for most custom frames.

Benefits include:

• lighter weight
• safer shipping
• shatter resistant
• excellent clarity
• UV protection options
• non-glare options available

For larger frames, acrylic is often the preferred choice because it significantly reduces weight and the risk of breakage.

Frequently Asked Questions

What is the most common picture frame size?

The most popular sizes include:

• 4×6
• 5×7
• 8×10
• 11×14
• 16×20

How do I know what size frame I need?

Measure the width and height of your artwork.

A frame listed as 16×20 is designed to hold artwork measuring exactly 16×20 inches.

Can I put an 8×10 photo in an 11×14 frame?

Yes.

Use an 11×14 frame with an 8×10 mat opening.

What if my artwork isn't a standard size?

Custom framing allows a frame to be built specifically for your artwork while letting you choose the frame style, mat, and acrylic.

Is acrylic better than glass?

For most applications, acrylic is lighter, safer, and less likely to break during shipping. It is especially well suited to larger frames and custom framing projects.

Find the Perfect Frame Size

Not sure what size frame you need?

Try our Frame Size Calculator to determine the ideal frame dimensions for your artwork, photos, certificates, or prints.

If your artwork isn't a standard size, we can build a custom frame made specifically for it, with your choice of moulding, mat board, and acrylic.