What's the Best Material for Picture Frame Backing and What Holds

Hi guys! Just a quick question or two I hope someone can help me with. I'm making a last minute picture frame as a holiday gift, and I'm not sure what to use for the backing board. I'm talking about the material that holds everything in the frame, not the matte for the photo or anything like that

50PCS hanging racks for clothes heavy duty Picture Frame Fixing Back Picture

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Picture frame backing and easel stands

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What's the Best Material for Picture Frame Backing and What Holds it in Place? - General Woodworking Talk - Wood Talk Online

SIZE: Holds one 5 x 7 photo MATERIAL: 100% natural wood frame DISPLAY: Easel back for tabletop display that will sit vertically or horizontally

5 x 7 Bordeaux & Cool Gold Narrow Width Table Top Frame - 100% Natural Wood & High Definition Glass, Used Vertically or Horizontally for Tabletop

What's the Best Material for Picture Frame Backing and What Holds it in Place? - General Woodworking Talk - Wood Talk Online

Good pre-owned condition. Has a nice black velvet easel back. Beautiful Frame. Unique design. Appears to be made out of a heavy resin. Picture

4” X 6” Picture Frame W/ Raised Ornate Leaf Design W/ Black Velvet Easel Back

Picture frame backing and easel stands

White Weathered Barn Wood Style Double Picture Frame Multiple Picture Frame Sizes for 4x6, 5x7, or 8x10 Photos Comes W/ Backing, Glass