Custom Multi-Opening Mat Boards for Picture Frames

Design the perfect custom multi-opening mat board using our online matboard designer. Create multi-opening mat boards for photos, prints, and artwork — add 1–100 openings, choose single or double mat layers, and pick from dozens of archival-quality colors to achieve a gallery-ready presentation.

design your multi-opening mat board layout in the online matboard designer

Step 1. Choose Custom Mat Board Sizes & Design Layout

Start by entering your custom mat board dimensions, then click "Cut Opening" to configure your multi-opening matting layout. You can adjust the exact width, height, and spacing for each window to build a precision-cut collage picture mat for your multi-photo frame. Design a unique collage mat board tailored exactly to your artwork's photo sizes.

choose mat colors and add a second layer

Step 2. Select Custom Picture Frame Mats & Acid-Free Colors

Personalize your custom picture frame mats by selecting single or double mat boards to enhance your layout's depth. Our online mat board designer offers a premium selection of archival, acid-free mat colors ranging from timeless gallery whites and deep blacks to vibrant tones. Elevate your multi-photo presentation by adjusting the bottom layer's accent reveal to complement your collage frame matting style.

upload and edit photos into each multi-opening mat board opening

Step 3. Upload Photos & Fill Your Collage Picture Mat Openings

Upload your digital photos directly into our multi-opening mat board tool to preview your complete framed art print collage. Digitally position, crop, and center each image inside the designated collage picture mat openings to ensure a flawless fit. This step turns your custom layout into a vibrant, high-quality multi-photo print that is perfectly aligned and ready for professional printing and final framing.

choose a frame and complete your collage order

Step 4. Choose a Custom Collage Picture Frame & Complete Your Display

Complete your project by adding your completed photo collage mat directly into a custom-built frame. Seamlessly pair your multi-photo mat board with our massive catalog of wood or metal frames to build a fully integrated collage picture frame system. Hit "Add to Cart" to lock in your custom layout dimensions and bring your picture frame collage to life.

Frequently Asked Questions About Multi-Opening Mat Boards

What is a multi-opening mat board?

A multi-opening mat board (frequently called a collage mat board) is a single piece of premium matting precision-cut with two or more windows. It allows you to showcase a collection of photos, art prints, or sports memorabilia together inside a single collage picture frame without buying separate displays.

How much smaller should my mat opening be than my photo?

To prevent your artwork from falling through the window, your matboard openings should be cut roughly 1/8 inch to 1/4 inch smaller than your actual image size. For example, if you are framing a standard 4x6 print, setting an exact window opening size of 3.75" x 5.75" ensures a perfect, secure fit.

What is the benefit of ordering a custom double mat board?

A double mat board layout places an accent mat layer directly beneath the primary top mat. This design creates a tiny colored border or "reveal" (typically 1/4 inch) around each of your collage picture mat openings. This technique adds deep visual dimension, isolates colors in your prints, and provides a professional gallery-grade aesthetic.

Are your collage picture mats archival and acid-free?

Yes, our online matboard designer lets you select from dozens of premium, acid-free mat colors. Using archival-quality matting protects your photographs and valuable paper artwork from yellowing, fading, or deteriorating over time, making them completely safe for long-term custom display.

Can I configure custom photo sizes in a single collage mat?

Yes! Unlike standard store-bought frames that limit you to matching grids, our builder gives you full control over your picture frame collage. You can freely mix and match vertical, horizontal, square, or custom window dimensions within the same multi-photo mat board layout to fit your specific vision.