Pay for your inventory.

[Ashgarth]

25 spaces per Armoury page.

Main Arm for each class - 20 spaces/+3 come HW (This leaves 2 free spaces)
Secondary Arm - 21 (+1 for PLD) = 24 come HW
All body gear, if we are looking at having all unique attire as some is still shared, 20 spaces/+3 come HW
Accessories, looking at about 7-8 slots as most are shared between roles and dps types
Rings, 14-16 spaces (still leaves 6-4 free spaces)
Soul Stones spaces are constantly expanding

Accessories and body pieces are all give or take, depending if jobs share the same thing. Main Arms are your only solid contender, and still you have empty slots. So where is it that we're capped in terms of necessary space?

Great.

Now add crafter materials to that lovely math.