I have a 8gb ram laptop device , what is the maximum map size i can make for my open world android game ? Please anyone tell me

I have a dream to build an big open big open world for mobile devices, as i am
New for unreal engine i want to know how big map i can make for mobile devices
( Like gta )
Can anyone please help me?

I have a dream to build an big open
big open world for mobile devices

It takes a studio of experienced people to pull it off. Do you have one?

I have a 8gb ram laptop device , what
is the maximum map size

This is an irrelevant and naïve question for reasons too numerous to list here, sadly. It does not have an answer as is. For example: what are you populating the world with and how are you doing it? Do read up on World Composition, though:

as i am New for unreal engine

This means you’ll struggle trying to create simple games for years before you have enough experience and know-how to attempt something more ambitious; at which point you’ll realise how much you need to scale the dream down to make it achievable. Sorry to burst your bubble.

Can anyone please help me?

Yes! Start very, very small. Make a dozen or so silly games from start to finish. Don’t quit your school / job / life. And keep on dreaming!