Foam board standard size

Start by evaluating where the board will be displayed and what final format you need. The foam board standard size of 100x70 cm is a widely used choice for posters and presentations, offering a good balance between visibility and manageability. For rigidity, pick thickness based on how you plan to handle the board: 5 mm for sturdier signs, or 3 mm if you need a lighter, easier-to-cut option. Decide on the material: foamboard (rigid core with faces) or plain foam (lighter, less stiff). In this category you’ll typically find white boards from generic brands designed to fit these common needs.

Thickness directly affects rigidity and weight for a given size. For a 100x70 cm board, 5 mm provides more stiffness and less flex, which helps keep graphics flat without a frame. A 3 mm board is lighter and easier to cut, but may bend or bow if the display is large or handled often. Match thickness to your display conditions and transport needs, noting that many foam board listings include both 3 mm and 5 mm options in the foam board family.

Beginners typically choose the 100x70 cm size for classroom posters or school projects because it is easy to manage and highly visible. Professionals or serious displays may prefer the thicker 5 mm version within the same size for extra durability and a premium feel. Both groups stay within the foam board standard size, but choose thickness according to use and expected handling. Whichever you pick, this size is a common, versatile option in the foam board category.

Use safe mounting methods such as poster corners or double‑sided tape designed for foam board; avoid heavy adhesives that could warp the surface. Trim edges with a sharp straightedge if needed, and store or transport the board upright to prevent bending. Keep the board dry and away from moisture to preserve the white finish and integrity of the foam core. The 100x70 cm standard size is easy to fit with common display stands or frames.

Some listings describe the product as foam board, while others simply call it foam in the same standard size. Foamboard typically has a rigid foam core with paper faces, delivering a sturdy surface that accepts mounting and lamination. Plain foam is lighter and more flexible, which can be suitable for temporary or draft displays but may not hold heavy graphics as well. When choosing, consider the white finish, the 100x70 cm size, and whether you need the extra rigidity of foamboard or the lighter feel of foam from the foam board family offered by generic brands.