eBay has Garage to store your car models and Collections (why does it still say beta after it's been live a few years?) to keep track of your trading cards.
I spotted a new item in the My eBay menu: Sizes
https://www.ebay.com/mysize/hub
Looks like it's just for shoes so far.
You can save your shoe size and by doing that the system will filter your search results to your saved sizes.
I haven't seen other posts or announcements about this. If I'm repeating info that's old news please ignore this post.
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