Styrene (Perspex) is a nice plastic safety sheet with protective film on both sides. that may give appearance of scratches but one's protective film will be removed and you'll find clear like Glass.
eBay
Magnetic Wooden Flip Art Photo Frame, A4 Photo Frame, DIY Photo Frame, Children's Storage Display
Aliexpress UK
The mount viewing window will be slightly smaller than the size given, approx 3mm of your picture will be covered on each side. Mount colours available: White & Ivory. The viewing window will be slightly smaller than the size given, approx 4mm of your picture will be covered on each side, this is to hold everything in place.
eBay
Magnetic Wooden Flip Art Photo Frame, A4 Photo Frame, DIY Photo Frame, Children's Storage Display
Aliexpress UK
eBay
DIY children's photo frame building block photo frame creative photo frame setting table
Aliexpress UK
Precision Cut Photo Mounts. Standard or custom mounts available. Self seal clear cellophane bags. · The mount window is cut at a 45 degree angle. Backing Cards. · Standard mount aperture cut 5mm smaller than image size.
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DIY photo frame 6inch，7inch building block photo frame creative photo frame gifts setting table
Aliexpress UK
Fixings are attached to allow for wall hanging. Hang as either landscape or portrait.
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Wooden DIY Photo Frame Painting Photo Wooden Blank Photo Frame Vertical Postcard Frame Set Home
Aliexpress UK
eBay
Golden Retro Small Photo Frame Photo Props Frame Ornaments Vintage Jewelry Nail Cosmetics Shooting
Aliexpress UK
There is a protective cover paper on the both side of the perspex sheet .
eBay
10Pcs Paper Photo Frame Simple Color Cardboard Picture Frame Set
Aliexpress UK
Sizes up to 14"x11" are Fitted with glass, bigger sizes are fitted with a High Quality Shatterproof Perspex Sheet.
eBay
A3 Mount Picture Frame Mounts 10 PCS Picture Photo Mounts Frame Mats White Photo Mounts For Picture
Aliexpress UK