from sys import getsizeof as gs

list1=[1]
list2=list([1])

list1==list2 #true
gs(list1)    #80.  (I guess 72 overhead +8 of the int)
gs(list2)    #104. (I guess 72 + 8 as above + 24 of...?)


list3=[1,2,3,4,5]
list4=list(list3)

gs(list3)    #112
gs(list4)    #136