It's not ideal, but you can search for 'larger_than:5m' and it will show mail greater than 5mb in size.

This is so rudimentary..

In old days, when hit by dreaded mailbox size exceeded notification, in Outlook I always used to sort mails by size and remove the attachments - which used to be the only culprit in mailbox bloat.

Go through top 10-20 mails, and you are set for another year or so before you hit the mailbox limit again. Rinse and repeat.

I know it's not what you're asking for and if someone tells me one more time "why would I need to sort when I can just search?" I will probably shout something rude at them.

But, do you know about their search options? You can use "size:5MB" for example to find emails over 5MB. This is what I do when I find I need to, as you say, trim the bloat.

More info on the feature can be found here: https://www.labnol.org/internet/gmail-size-search/26669/

You can search by size in gmail in the web site. Also, you can connect any pop/imap email client and sort by whatever you want. Even if you don't want to use Thunderbird full time, spend 10 minutes once a year to get it connected and do some mailbox cleaning and you can pretty much solve this problem.

Alternatively, you can just archive off X years off mail and store it off of gmail. That way if you ever need it you can always dig it up.

I think you can use a IMAP client like Thunderbird to clean it up.

(I say "think" because while I use a gmail account in my email client, I only use it to receive notifications from Google, so no wild folder/tags setup, and I never check the webmail to see if it matches the emails I see in Thunderbird)

You can. That's how I manage it. larger:3M smaller:4M (for example).

ANY sorting would be nice.