To sort Gmail by size, you can use specific search commands. On desktop, type larger:2M in the search bar to find emails over 2MB. On mobile, use the command Size:2MB in the search bar. Adjust the ...
You can sort by sender in Gmail by right-clicking an email, or by using the "search options" menu. If you already have an email from the sender you want to sort by, right-click it and select "Find ...