How to identify size of attachments on a Purchase Order

Summary:

We have come to know that there is a 15MB size restriction at a Data Center level on email attachments to Supplier. We were having some issues where some emails were not going out to Suppliers and after raising few SRs we have come to know about the root cause of the issue which is Attachment Size.

Now it is very tedious and time consuming activity to download all the attachments on a Purchase Order and then sum up the size of all attachments to see whether they are below the threshold of 15MB or not. We are looking for a way if there is a way to identify the cumulative size of Attachments on a PO (like a SQL script or something) which we can turn into a BIP report and give it to our users.