2 minute favor needed from an E46 M3 Coupe owner

Need someone to measure the width of the back seat from side to side in an E46 M3 coupe (no verts please). I'm trying to determine if I can fit all my kids in the back in a pinch if needed and I've looked high and low for this info online.

Basically, what is the "hip width" so that I have a good measurement?

Thanks for anyone who can provide this!

2 minute favor needed from an E46 M3 Coupe owner