Choosing the right foam board for poster mounting ensures clean presentation and durable displays. The following selections cover common sizes, thicknesses, and both single- and double-sided options to support mounting photographs, artwork, signs, and crafts. Each option is acid-free or archival-friendly where noted, offering smooth surfaces ready for paint, markers, or glue. This guide highlights five top picks that balance rigidity, lightweight handling, and ease of use for classrooms, galleries, studios, and home projects.
| Product | Size | Thickness | ||
|---|---|---|---|---|
| Navy Penguin Foam Board 12 x 16 | 12 x 16 in | 3/16 in (5 mm) | 12 pack | Acid-free, double-sided |
| IN WHICH BAY Foam Board 24 x 36 | 24 x 36 in | 3/16 in (5 mm) | 3 pack | Double-sided, acid-free |
| Navy Penguin Foam Board 24 x 36 | 24 x 36 in | 3/16 in (5 mm) | 12 pack | Double-sided, acid-free |
| MBC Mat Board Center 11 x 14 | 11 x 14 in | 1/8 in | 10 sheets | Acid-free, lightweight |
| Evadow 11 x 15 Foam Board | 11 x 15 in | 3/16 in (5 mm) | 20 pack | Smooth surface, mounting backing |
Below are five carefully selected foam board options ideal for poster mounting, art displays, and craft projects. Each entry provides a concise look at size, thickness, and key features to help buyers compare quickly and choose confidently.
Foam Board 12 x 16 – Premium 12 Pack

Navy Penguin’s Foam Board 12 x 16 inches come in a 12-pack, designed for reliable mounting and display. The boards are 3/16-inch thick (5 mm) with a white, hard surface. The foam core is acid-free and double-sided, providing a sturdy, lightweight base that accepts screen printing, glue, paint, or markers. The package emphasizes protective packaging to prevent edge or corner damage, ideal for classrooms, studios, and presentation setups.
IN WHICH BAY Foam Board 24 x 36 – 3 Pack

IN WHICH BAY offers a large-format foam board set measuring 24 x 36 inches in a convenient 3-pack. Each board is 3/16-inch thick and white on both sides, providing a smooth, acid-free surface suitable for mounting, writing, and printing. The boards are designed to arrive with pristine edges and corners, ready for immediate use, and their double-sided design enhances versatility for displays and crafts.
Foam Board 24 x 36 – 12 Pack

This Navy Penguin option expands to a 24 x 36 inch board, 3/16 inch thick, offering a large, rigid, double-sided surface. The foam core is acid-free to maintain long-term integrity of mounted items. The white surface is suitable for prints, photos, and presentations, balancing durability with light weight for easy handling and mounting.
Mat Board Center 11 x 14 – Acid-Free Pack

Mat Board Center provides a professional display solution with ten 11 x 14 inch white foam boards, each 1/8 inch thick and acid-free. This set is ideal for gallery-quality mounting of photographs, posters, and artwork, delivering clean edges and reliable rigidity while remaining easy to cut and mount.
Evadow 11 x 15 – 20 Pack Foam Core Board

Evadow’s foam core boards measure 11 x 15 inches with a 3/16-inch thickness. The set includes 20 boards designed for mounting photos and artwork, offering a durable backing that remains lightweight. Boards feature a smooth, white surface suitable for painting, mounting, and display applications, with backing that supports a range of craft projects and signage.
Buying Guide
Key considerations when selecting foam boards for poster mounting:
- Size and orientation: Choose boards that fit your artwork dimensions and intended display format, including landscape or portrait layouts.
- Thickness and rigidity: Thicker boards (3/16 inch) provide stronger support for heavier prints and framing, while thinner boards are lighter and easier to cut.
- Surface quality: Look for smooth surfaces that accept paints, markers, and adhesives without warping or bleeding. Acid-free options help preserve artwork over time.
- Double-sided vs single-sided: Double-sided boards offer versatility for mounting on either side; single-sided boards may be lighter and more economical for simple projects.
- Pack size and packaging: Larger packs reduce per-board cost and minimize delivery damage; choose protective packaging to safeguard edges during transit.
- Adhesive compatibility: If mounting with self-adhesive backing or adhesives, ensure the board material supports the intended mounting method without warping.
- Applications: Consider whether you need boards for crafts, prints, photos, signage, or architectural models to determine the ideal balance of weight, rigidity, and workability.
- Color and finish: White surfaces are versatile for most displays; a pure white or bright white surface can affect color fidelity of mounted prints.
In practice, for classroom or gallery mounting, a mix of large-format boards (24 x 36) for posters and smaller 11 x 14 or 12 x 16 boards for proofs and display cards provides flexibility. Prioritize acid-free, double-sided boards when archival quality matters, and select thicker options for heavier frames or mounting integrally with lightweight adhesives. Always verify edge integrity on multi-pack orders to avoid edge damage during shipping.