Incredibly Interconnectable ToysKADU Forest 250 Piece Set - STEM / STEAM Building + Construction for Open + Imaginative Play

Q: What are the approximate dimensions of these pieces? Do they fit with Target's like-item toy?

Each piece is approximately 3/4 inch x 3/4 inch x 1/8 inch (20mmx20mmx4mm). It is based on a 4-millimeter slot/peg connection. Not knowing the exact brand you are asking about we can't say if they would fit together or not. Please measure your other blocks to be sure. Thank you!