Foam Board 16 x 20 in 12 Pack - Acid Free Poster Foamboard for Crafts

In this review the focus is on a 12 pack of 16 x 20 in white foam boards intended for craft, school and display use; the bottom line is that this set is best for crafters and students who need consistent, lightweight backing at an affordable per-sheet price. The reviewer found the boards useful because they combine an acid-free surface with a polystyrene foam core and a 3/16 in thickness that resists warping, so projects needing color stability and a sturdy backing benefit most from this pack.

Key Features

• Acid-free surface: The paper facing is acid free so artwork and photos are less likely to yellow or become brittle over time, preserving color stability for displays and archival projects.
• Polystyrene foam core: A lightweight but high-density core gives each board strong backing for mounting photos, dried flowers, ribbon and other decorations without sagging.
• Dual-sided usability: Both sides offer a smooth, writable surface so users can print, draw, tape or glue on either face with predictable results.
• 3-layer construction: The three-layer design improves warp resistance, keeping posters and signs flat for presentations and exhibitions.
• Easy to cut and shape: The 3/16 in thickness trims cleanly with a craft knife or scissors, allowing precise letters and geometric cutouts without special tools.
• Secure packaging: Sheets arrive in reinforced packaging with corner protection and bubble wrap to reduce damage during shipping.

Who It's For

This pack is aimed at hobbyists, art students, teachers and event planners who need multiple consistent sheets for posters, photo walls or school projects. The 16 x 20 in size is a convenient midpoint for display boards, signage and portfolio samples where a sturdy, lightweight backing is needed.

Those who need very thick mounting board for heavy mixed-media sculpture or repeated outdoor exposure in harsh weather should look for heavier-duty substrates or waterproof varieties, since these are standard polystyrene foam core boards best suited to indoor or short-term outdoor use.

Pros & Cons

Pros

• Acid-free surface preserves color and reduces yellowing over time.
• Lightweight polystyrene core provides strong backing without added weight.
• Sheets cut cleanly for precise craft and display work using common tools.
• Pack of 12 offers good value for classrooms or multi-piece projects.

Cons

• Not intended as a weatherproof or heavy structural board for long-term outdoor installations.
• The 3/16 in thickness is modest and may not suit projects needing very rigid, thick support.

Specifications

Brand	ToLanbbt
Quantity	12 sheets
Sheet size	16 x 20 in
Thickness	3/16 in (5mm)
Core material	Polystyrene foam
Surface	Acid-free paper, dual sided
Packaging	Corner protectors, tape seal, bubble wrap

Our Verdict

This 12 pack of 16 x 20 in foam boards is a practical choice for crafters, teachers and event organizers who need reliable, acid-free backing that cuts and displays well. It represents good value for multi-sheet projects and keeps mounted work flat thanks to the 3-layer design; buy it if you want affordable, lightweight poster board for indoor displays and school or wedding projects.

Frequently Asked Questions

Are these boards acid free?
Yes, the facing paper is acid free to reduce yellowing and help preserve mounted artwork and photos.

How thick are the sheets?
Each sheet is 3/16 in (about 5mm) thick, which is easy to cut while providing firm backing for displays.

Can I cut these with a craft knife?
Yes, the boards trim cleanly with a craft knife or scissors and are suitable for letters, shapes and model work.