How do i get the size about embedding lookup?

I am studying memory bandwidth.
I want to know the data capacity when I look up on the embedding table.
For example, when you look up three out of five, how do you know how many bytes the three sizes are?
Also, I want to know how much memory bandwidth is consumed when looking up using the EmbeddingBag function or the Embedding function.
How can I check it?

Thank you.