The snake more than likely is not even 4.5 ft long. The OP said that s/he measured the shed.
Sheds are longer than the snake because the skin wraps underneath the scales as well.
I've heard some snake people say that the shed is 20% longer than the snake, and others say 15%.
I don't think that there is really a hard fast truism.
Welcome to the forum VV.
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