Big
Use before a singular noun to mean 'great' or 'important,' rather than just physically large.
Means 'enormous' or 'huge.' Use it when something is very, very big.
Means 'spacious' or 'wide.' Use it for rooms, spaces, or opportunities.
The house is big.
I have a big car.
It's a great day.
The apartment is very spacious.
The elephant is an enormous animal.
The word 'grande' is the standard, universal term for 'big' across the entire Spanish-speaking world, from Mexico to Argentina to Spain.
In casual conversation, you may hear 'grandote' used to mean 'very big,' often in an affectionate or slightly exaggerated way. 'Grande' remains the standard.
Usage is identical to Latin America for 'grande.' For people, they might informally use 'grandullón' to describe a big, tall person, but this is more advanced slang.
Using 'grando' or 'granda' for gender. — Unlike many Spanish adjectives, 'grande' does not change its ending for masculine or feminine nouns. It's always 'grande'. Incorrect: 'La casa es granda.' Correct: 'La casa es grande.'
Confusing 'grande' and 'gran'. — The meaning changes with placement. 'Un hombre grande' is a physically big man. 'Un gran hombre' is a great, important man. As a beginner, place 'grande' after the noun to mean 'big'.
Using 'largo' to mean 'large'. — 'Largo' looks like 'large,' but it's a false friend—it means 'long'. Incorrect: 'Quiero una camisa larga' (I want a long shirt). Correct for size: 'Quiero una camisa grande' (I want a large shirt).