Easy. Just place your PROJECTOR and accessories all together the way you'd like them in the case. THEN MEASURE THEM as though they're one unit/item! This form will add the total width, total depth and height. JUST MATCHUP the "LCM" (lineal centimeters) below as you answer questions!
PREMIUM SERIES by Blue Cat Case Company
Internal : 15mm high density EVA/PE foam (no cheap pearl or sponge foams)
External : Penn Elcom (genuine)recessed latches, handles, corners, hinges
Panel: 6mm x 5ply near marine grade ABS ply (no cheap laminate or vinyl