20 mil. - Punch out magnetic picture frame with rounded corners and rectangle shaped center. Frame size 3" x 3 3/4", holds a wallet size photo and note holder measures 2" x 2 3/4". Non-toxic USA made white flexible indoor magnets with clear protective laminate. Write-on surface not available. The center portion of the Photo-Mag Plus (TM) is perfect as a mini business card, calendar, coupon, flag or more. Fits wallet size photos or simply cut down any snapshot to fit.