LEGO part 73831 - Blue Plate, Modified 2 x 3 with Cutout at BrickScout
Amazon.com: LEGO Parts and Pieces: Assorted 2x3 Bricks (Blue, Green, Orange, Red, Yellow) - 50 Pieces : Toys & Games
Amazon.com: LEGO Parts and Pieces: Light Gray (Medium Stone Grey) 2x3 Brick x50 : Toys & Games
LEGO® Parts: Plate 2 x 3 #3020 (Pack of 8) – Wholesale~BricksandFigs
Gobricks GDS-598 ROOF TILE 2X3/25 INV compatible with lego 3747 pieces of children's DIY Educational Building Blocks Te - AliExpress
Amazon.com: Classic Bulk Brick Block 2x3, 100 Piece Light Gray Brick 2x3,Compatible with Lego Parts and Pieces 3002, Creative Play Set - Compatible with Major Brands(Colour:Light Gray) : Toys & Games
Lego Plate 2x3 (3021) – Display Frames for Lego Minifigures
1x 22886 WHITE Brick 1 x 2 x 3 LEGO Part – Brickheads Collectables