What tank bag, from where and what size?

[ColD]

Hey dogs

Can I have a few opinions on tank bags, based on
Good to have or not,
what brand,
Available where,
what cost,
Optimum size
Straps magnets or clip on system.

Or what workes for you, as I am looking to buy one in the next week or so or not.

PS I am on a TIGER XC 800

Thanks to all

 

[Piston Pete]

 

[Chairman Meow]

 

[Berty77]

 

[antondp]

 

[Adventurer]