Hi all

I'm new to the forum.
I'm not sure how to determine which watches can accommodate which bracelets...
I'm deciding between the beautifully skeletal

B04 GMT and B06 from the 2013 Bentley collection, but would love to put a mesh bracelet (Ocean Classic / Aero Classic) on it. The boutique has told me it's not possible, but it's unclear if it actually wouldn't "fit", or if it's simply because it's not an official combination that can be done.
What measurements should I be looking at to determine whether this combination would be possible?
Thanks!