I build my own frames, wood with a colored plaster overlay, then finished with a final coat of wax.
These days primarily wood with a plaster overlay. Available in all sizes including custom specifications
Plaster over wood frames
Link to review of possible frame colors, on the Thank you-history pages
8x10...$50
10x15..$65
10x20..$70
12x18..$70
15x30..$100
18x36..$120
20x30..$130
20x40..$160
24x36..$160
24x48..$185
Custom sizes
Custom sizes small to 20" on long side.. $160
Custom sizes medium 21" to 36" on long side.. $200
Custom sizes large 37" to 60" on long side.. $350
Price does not include sales tax or shipping