What are the outside dimensions of the case on model number CMMT12023? Wilson October 03, 2020 20:01 The outside dimensions are It is 17? x 15 ¼? x 4? . Related articles What is the part number for the spool for the CMCST910? Where is the date code listed on the model # CMCCS620? Comments 0 comments Please sign in to leave a comment.