Is it trimmed? Are there size tolerances/variances?

On this 57 power hitters I've looked at every edge through my loupe, they all look the same. Nothing sticks out to me as an obvious trim other than it's a hair short. Side to size it measures dead on. Top to bottom its short. The card is in great shape, if it was trimmed the tiny sliver they took off would not have done nothing to make the card look better. Obviously grading is the only way to get a definitive answer, but are there size allowances?
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It is possible to get Evidence of Trim and MinSize. The former will be charged, the latter will not.
Card could be ok. Yes there are different sizes on cards. Dealers in vintage have told me they can tell the difference between a wax pack card, a vending card and a Presentation Set card.
In looking at PSA graded examples on ebay, that card looks like the borders are too small, more than a "sliver".
https://www.ebay.com/itm/1957-Topps-407-Yankees-Power-Hitters-Mickey-Mantle-Yogi-Berra-HOF-PSA-4/362994141314?hash=item5484230882:g:3P8AAOSwdnhevSm2
Yeah I've looked at tons on eBay. Side to side thge card is dead nuts 2 and 1/2 with a ruler and stacked on top of another card. Top to bottom its in between the line before the 3 and 1/2 Mark and the actual three and a half line.
It's def short top to bottom. No question. But the edges all feel the same, and through the loupe they are all porus. I mean I'm leaning towards trimmed. But I know I've graded several 48 leaf boxing cards that measured slightly different. And I'm still trying to figure out what purpose there was to trim this card if it is indeed trimmed.
Could be a few reasons why it was trimmed. If , for no other reason to improve eye appeal if some bottom edge was removed. Or it could have had a "ding" that was removed.
Sounds like you know what to look for on the edges, card certainly could have come from the factory as is.
The question is what will PSA think.
I'm learning. I've done a lot of trimming research. The edges feel a bit smoother than other cards, that concerns me, but through a loop they look the same. I'm still leaning towards trimmed, but I always like to get opinions here. You guys are awesome. I'll sub it to SGC, worst case it comes back encased with a big fat A on the flip. Best case it comes back a 6. Thanks for your help. I welcome others opinions as well.