It will not fit in your pocket unless you have very big pockets... on the web site
click the picture and it will show you how large it is...

The Lowepro Rolling Compu Trekker Plus AW is a great roller / backpack and carry on case for the EX1. It's a bit heavy if you have to carry it but I roll it most of the time.

Lowepro | Rolling Compu Trekker Plus AW Backpack | LP34704-PEF

based on your link, the PMW-EX1 would not fit into this lowepro with a notebook.
check these dimensions from the site.

Main Compartment: 13 x 5.5 x 16.3" (33.02 x 13.97 x 41.4 cm) (WxDxH)
Notebook sleeve: 11 x 1.6 x 13.6" (27.94 x 4.06 x 34.54 cm) (WxDxH)

the PMW-EX1 is
Dimensions (WxHxD)
7.2 x 7 x 12.4" (17.8 x 17.6 x 31.2cm)

paul