How to find the size of a list in Python

Code from video:
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company = ['julia', 'erick', 'dillon']
len(company)
import sys

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[uxlabkol]

Very informative video.. I had a doubt and it is a bit off topic. why sys.getsizeof(range(1000)) gives 48 bytes? whatever value is passed through range, I am always getting 48bytes. Thank you