20 Pack 18in x 24in White Corrugated Plastic Sign Boards - Double

In this review the 20 Pack 18in x 24in White Corrugated Plastic Sign Boards is judged on durability, size and practical use for short-term outdoor signage. The bottom line: this set is best for organizers who need a cheap, reusable blank canvas for lawn signs, garage sales, open houses and quick directional markers. The reviewer found the 4 mm corrugated construction to be sturdy enough for repeated use, easy to cut and fold to custom sizes, and reliably waterproof for weekend events, making it a sensible choice when clients want simple, double-sided white signs at a low per-piece cost.

Key Features

• Size: Each board measures 18in tall by 24in wide, a common yard sign dimension that offers good visibility from the street.
• Thickness and durability: Made from 4 mm corrugated plastic, the boards resist bending and stand up well in light wind when staked or propped.
• Material and weather resistance: The high quality corrugated plastic is waterproof and reusable, so signs survive short-term outdoor use and occasional wet conditions.
• Customizable: You can cut and fold the corrugated plastic easily to meet preferred sizes and shapes for tailored messaging or smaller display areas.
• Pack quantity: The set includes 20 blank yard signs, providing enough pieces for multiple events, directional needs, or bulk distribution.
• Double sided: Both faces are usable so messaging is visible from either direction without reorienting the board.

Who It's For

This product suits homeowners, estate sale coordinators, open house hosts and community organizers who need inexpensive, customizable signs for short-term outdoor events. The blank white surface works well for hand-lettering with paint, adhesive letters, printed vinyl, or marker, and the 20-pack gives small organizations enough stock for neighborhood distribution or multiple simultaneous placements.

Those who need heavy-duty, permanent signage or professional full-color printed boards with rigid metal framing should look elsewhere. Also, if you require pre-printed graphics or exact die-cut shapes from a sign shop, these blank corrugated boards are intended for DIY customization rather than final production signage.

Pros & Cons

Pros

• Durable 4 mm corrugated plastic offers useful rigidity for short-term outdoor use.
• Waterproof material lets signs be used in light rain without immediate damage.
• Easy to cut and fold for custom sizes, making them flexible for many projects.
• Twenty boards in a pack provide good value for multiple signs or events.

Cons

• Blank white finish requires ink, paint or vinyl to create professional-looking graphics.
• Not designed for permanent long-term installations or extreme weather exposure.

Specifications

Brand	Newflager
Material	Corrugated plastic
Color	White
Size	18in tall x 24in wide
Thickness	4 mm
Quantity	20 blank yard signs

Our Verdict

For buyers who need a cost-effective, reusable blank sign option for garage sales, open houses, yard events and directional signage, this 20 pack delivers solid value. The corrugated 4 mm construction balances durability with easy customization, making it a practical choice for short-term outdoor use where simple, double-sided white signs are sufficient.

Frequently Asked Questions

Are these signs waterproof?
Yes, the corrugated plastic is waterproof and suitable for short-term outdoor use in light rain.

Can they be cut to a different size?
Yes, the boards can be cut and folded to meet preferred sizes and shapes for custom projects.

How many come in a pack?
This product includes 20 blank yard signs in the pack.