Four acrylic bars snap together across the top and bottom of a poster with secure magnets, making it easy to switch things up as often as you wish without damage or fuss.
Small measures 8" x 0.4" x 0.2" (20.3 x 1 x 0.5 cm), works well with 8" x 10" art
Large measures 15.75" x 0.4" (40 x 1 cm), works with art up to 18" wide. Pictured here with an 11x14 print.