A: Thank you for your question, Mike. The product dimensions are 5.67 x 5.67 x 1 inches.
A: As it turns out, i'm answering this question myself. I ordered one of these, it's not square its round as shown in the main product picture, the extra pictures that show a square shape are NOT this product. Target please note ... update the pictures! I'm sure this is a fine smoke alarm and at a good price but the unusual square shape in photos might be attractive to some buyers who will be disappointed to receive a run-of-the-mill round alarm.