6 Best Shadow Box Spacers For Dimensional Fiber Art

Fiber art is rarely as flat as a standard picture frame requires. Whether it is a dense, cabled tapestry or a delicate piece of hand-spun lace, preserving the texture and dimension of the work is essential for display. Shadow box spacers bridge the gap between the glass and the backing, preventing your work from being flattened or crushed. Choosing the right spacer ensures that the air can circulate, maintaining the integrity of the fibers over time.

Frame-Tek EconoSpace: Most Versatile Spacer

Frame-Tek EconoSpace is the industry standard for a reason. Its unique U-shaped design allows it to slip easily over the edge of the glass, creating an instant perimeter that keeps fiber projects from touching the glazing.

This spacer is highly flexible, making it ideal for those who frequently switch between different weights of yarn or varied knitting structures. If a wall hanging has thick, lofty wool roving or chunky bobbles, the depth offered by this system provides ample clearance to prevent the fibers from matting against the frame face.

While incredibly practical, the plastic can sometimes appear slightly bulky in very thin frames. It works best when the visual goal is function over total invisibility.

Lineco Archival Spacers: Best for Preservation

When dealing with heirloom-quality pieces or vintage mohair lace, acid-free materials are non-negotiable. Lineco Archival Spacers are designed to prevent the yellowing and degradation that can occur when sensitive natural fibers come into contact with standard plastics or adhesives.

Fiber arts are susceptible to environmental damage, and trapping chemicals against wool or silk can lead to permanent discoloration over years. Using archival-grade spacers creates a safe, pH-neutral environment that mimics museum-quality standards.

These spacers are often adhesive-backed, which offers a sturdy, permanent grip. However, because the adhesive is strong, care must be taken during installation to ensure it does not touch the art itself.

DIY Foam Core Strips: Best for Custom Depths

Sometimes, a project is just too bulky for pre-manufactured spacers. Strips of foam core board serve as an excellent, budget-friendly alternative that can be cut to any specific depth needed for your dimensional work.

This is particularly useful for sculptural knitwear or pieces with significant internal structure. By layering multiple strips of foam core, you can create a custom shadow box depth that accommodates even the deepest of stitch patterns or complex embellishments.

The primary drawback is the labor involved in cutting and finishing the edges. To ensure a professional look, cover the foam core with acid-free tape or linen tape to prevent the raw foam from shedding particles onto the fiber.

Nielsen Bainbridge Clear Spacers: Best Invisible Look

For those who want the frame to disappear and the art to take center stage, Nielsen Bainbridge Clear Spacers are the top choice. These transparent, acrylic-based spacers are virtually undetectable once the frame is closed.

They are perfect for delicate items like fine-gauge cashmere or intricate embroidery where you want a clean, minimalist aesthetic. The clarity ensures that no colored edges distract from the color palette of the fiber.

These spacers typically sit flush against the glass. Because they offer a narrower profile than some chunkier alternatives, they are best suited for projects with moderate texture rather than extreme 3D depth.

Frame Destination Metal Spacers: For Heavy Art

Heavy, dense fiber art—such as pieces weighted with glass beads or thick, multi-ply cables—requires a robust mounting solution. Metal spacers provide the rigid support necessary to hold significant weight without bowing or shifting.

Metal offers a level of structural stability that plastic or foam simply cannot match. If you are framing a heavy tapestry that needs to be mounted vertically, these spacers provide the mechanical strength to keep the frame square and the glass secure.

Because they are rigid, they are less forgiving during installation than foam or plastic. Ensure your frame dimensions are exact before choosing metal to avoid alignment issues.

3L Mounting Squares: Easiest for Small Projects

For small swatches, fiber jewelry, or test-knit samples, full-length spacers can be overkill. 3L mounting squares allow you to create “point” supports that elevate the glass just enough to protect the fibers without needing a full frame modification.

These are excellent for beginners who are intimidated by cutting long strips of material. They provide quick, localized clearance for small 3D elements like pom-poms or tassels.

These squares are designed for convenience, but they do not provide a sealed edge. If you are worried about dust infiltration, combine these with a dust-cover backing for the best protection.

How to Choose the Right Spacer Depth for Your Art

Determining the depth is a matter of measuring the highest point of your fiber art and adding a small margin of safety. A project with long, loose fringe will require more clearance than a piece featuring tight, flat colorwork.

Always err on the side of a deeper spacer to prevent the glass from “kissing” the surface of your work. Friction against glass can cause delicate fibers to fray or shed over time, compromising the appearance of your hard work.

Take into account the thickness of the backing board and any mounting fabric used behind the art. When in doubt, measure the thickest part of the piece and add at least 3mm for air movement.

Spacer Materials: Plastic, Foam, and Metal Compared

• Plastic (EconoSpace/Clear): Lightweight, easy to install, and generally moisture-resistant. Best for standard projects.
• Foam Core: Highly customizable and inexpensive. Requires manual finishing and can shed debris if not wrapped.
• Metal: Heavy-duty and rigid. Ideal for large, weighted tapestries but unforgiving during the assembly process.

Choosing the right material often comes down to the longevity of the project. For permanent display, prioritize archival-safe materials over cost or ease of use.

Installing Spacers: A Quick Step-by-Step Guide

1. Clean the glass: Remove all dust and static from the interior of the glass before starting.
2. Measure and cut: Determine the required length and cut your spacers to fit the internal dimensions of your frame.
3. Position: Place the spacers along the inner perimeter of the glass or the frame rabbet, depending on the specific product design.
4. Secure: Use the provided adhesive or mechanical fit to lock the spacers into place.
5. Seal: Ensure the backing board is airtight to prevent dust or pests from entering the frame space.

Common Mistakes When Framing Dimensional Fiber Art

The most frequent error is failing to account for the “settling” of fibers over time. Even if a piece looks flat, gravity will eventually cause soft yarns to stretch or slump, potentially pushing them against the glass.

Another mistake is using non-breathable materials in high-humidity environments. Fiber art needs a degree of airflow to prevent mold, so avoid completely sealing a frame if the environment is prone to dampness.

Finally, do not rely on gravity alone to hold your art in place. Always use pins, hidden stitches, or acid-free adhesives to secure the fiber to the backing board before installing the spacers.

Properly executed, a shadow box display will elevate your fiber art into a true masterpiece of home decor. By selecting the right spacers, you ensure that your stitches remain vibrant and preserved for years to come.