The size field in a lead on desktop has a sequence and allows for sorting, but the Web UI does not use or show the sequence, instead using the size code which sorts them incorrectly, (1, 10, 2, 20 etc.) This was sortable by sequence in the desktop, but not in the web UI.
We could provide an option on a per-entity basis to say what the drop down sort is. The deafult for this drop down would be by "Average Value"