Wilton Charcoal A3 (16.5x11.75) frame with Grey mount cut for image size A4 (11.75x8.25)
Nielsen Apollo A3 Black Matt Wood Glass Picture Frame A4 Mount | Unique Arts Webshop
White Box Frame A4 without mount (9" x 5.5" with mount) - Home Accessories from Readers Interiors UK
Mounted A3 Frame, Silver, Elle Range - for A4 Print – Tishapix
Black A3 Boxed Picture Frames Set of 3 with Double Mounts for A4 & 6x8 photo,
SILD A3 Frame With Mount For A3/A4 Picture Frames, Certificate Frame or Poster frame, Black Photo Frame, Wood Frame Plexiaglass Window, With White Picture Mount for A4 frame (2 Pack, A3 Black) :