Do squats actually make your butt bigger?

I've been doing squats every day (continuous squats for 3-4 mins) x3)) for the past two months and I've noticed today in a shop changing room that my butt actually looks smaller?

Or are shop changing room lights made to make you look slimmer? And also does wearing heels make the bum look bigger

(And by the way I am not fat at all or emaciated skinny either)
Do squats actually make your butt bigger?
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