Sorry I haven't shared these before now! This is what I use along with Stitchery Tape to finish my stitched pieces. They're acid-free foam core in white and each measures 5" x 7" and is 3/16" thick. You get THREE boards for one price.
Golden State Art, Pack of 10, 3/16 Thick, 5x7 Black
These standard foam boards are used for many different mounting applications. They are available in two different thicknesses (3/16 inch and 1/2 inch) and two colors (black and white). Choose your size, thickness and use hot or cold mounting adhesive to mount your documents, posters, and POP materials for high quality finished results.
White 3/16 inch Foam Core 24 inch x 36 inch Mounting Boards - 25pk MyBinding 550432 White
Mat Board Center, 10 Pack 3/16 Thick White with
Golden State Art, Pack of 10, 3/16 Thick, 5x7 Black
Foam Core Backing Board 3/16 White 24x36- 5 Pack. Many Sizes
Golden State Art, Pack of 10, 3/16 Thick, 5x7 Black
3/16 Black Foam Core Boards 5x7-50 Pack. Many
Sorry I haven't shared these before now! This is what I use along with Stitchery Tape to finish my stitched pieces. They're acid-free foam core in
Three 5 x 7-inch foam core boards for mounting
Mat Board Center, 10 Pack 3/16 Thick White with
MyBinding 550432 White
White 3/16 Foam Core 24 x 36 Mounting Boards - 25pk
Each of our foam sheets are finished in brilliant bright white suitable for displaying photographs. The sturdy 3mm (0.12) foam core boards can be used for a variety of tasks from model making to photo mounting.
Acrux7 A3 Foam Board, 16 Pack Polystyrene Sheets 5mm White Hard Paper Outer Foam Boards Photo Mount Board Wedding Signs (297 × 420mm)