Chest pocket depth

[Russell Street]

Why do coat pocket depths vary so? Particularly that chest pocket that one stuffs with a pochette?
My observation, oddly, is that RTW ones are deeper than bespoke. I have no idea why, and this is a painfully small sampling involving only one tailor.
Please validate, explain.

 

[ElioDA]

It's not in good taste to discuss the depth of one's pockets.

 

[Thruth]

We have the elite thread for that

 

[Russell Street]

Let me rephrase then...what's up with these 17" pocket squares? Is that so you have a parrot sticking out, or do some people have more ahem room to stash such things?
Does my tailor know that I won't be stuffing pens or sunglasses in thar?

 

[LelandJ]

My Isaia patch pocket suit my sunglasses stick out most of one whole lense while my or Luigi Bianchi Mantova suits and fake suits engulf almost the entire frame which I like. Feel too Pittiful when I put my sunglasses in Isaia pocket.

 

[Fwiffo]

I have a knock off RLBL where somehow every pocket including the chest pocket is deeper than what they were asked to copy.

It gives me a chance to fold my squares to fit the jacket and to fuss about it if it's too big and the square keeps disappearing on and off all day.