DIY invitation metallic pockets. Pearla is identical to metallic. Fold flaps in at bottom and one side. Glue or tape down to form pocket. Use the flat cards to print your invitation details on and slip into the assembled pocket. Commonly used for wedding and engagement invitations. Metallic Pockets are available in sizes: C6 (114 x 162mm), 140mm Square, 150mm square and DL (110 x 210mm).