Morning,
I would like to know what's the sizes of an Acoustic Guitar? Is there like a standard one?
I bought an Acoustic Guitar back then and it was too big for me to use.
If there is sizes that would make it easy for me to buy one that is ok with my size.
I'm a 170cm tall girl with long hands but as you know girls mah, big guitar harder.

thanks and hope to get some replies soon.

The standard one should be Dreadnought size?

I think you can try out some smaller guitars like the Taylor Big Baby, Fenders 3/4 or some other Parlour guitars.

Here's a rough guide to shapes (Taylor ver)
https://www.taylorguitars.com/guitars/acoustic/shapes