This is the White Flexible Magnetic Sheet from the Magnet Source.
Not for Children!
FEATURES: White magnetic sheet
Vinyl surface can be painted with acrylic paint, fabric paint,
markers, stencil pens, and paint pens
Decorate with stickers, glitter glue, fabric, ribbon/lace, wall
paper, contact paper, colored sand, sequins/buttons, yarn/thread,
craft eyes, pom poms and pipe cleaners
Use for crafts, hobby, home, school projects and much more
INCLUDES: One 5x8" white magnetic sheet
SPECS: Length: 8" (203mm)
Width: 5" (127mm)