The Dm10 Pro kit:
The long curved bar: 90 cm (35 inches)
The two longer horizontal bars (one for the module and hihat, the other for the floor tom): 60cm (24 inches)
The short horizontal bar (for the snare): 45cm (18 inches)
As the two middle horizontal bars on the Dm10 X are barely longer thank the width of the two 10" pads I'd guess that they are about 60 cm (24 inches) long. It's just a guess, though.