The Piece Fills the Cutout Exactly
The correct piece slots into the cutout perfectly — same outline, same size.
Tip: Mentally trace the cutout's edges and find the piece whose outline matches.
Rotated Pieces Don't Fit
A piece rotated by 90 degrees has the same shape but a different orientation — it won't fit.
Tip: The piece must be in the same orientation as it would slot in.
Mirrored Pieces Don't Fit Either
Mirroring a piece flips its shape left-to-right — like trying to put a left-hand glove on your right hand.
Tip: Even if every edge length is the same, a mirrored piece won't slot in.
Size Matters
Wrong-size pieces are common distractors — they look right but are bigger or smaller.
Tip: Eyeball the cutout's width and height before comparing to the piece options.