Just in case I am going to frame conventionally I'd like paintings/art to be squared as most frames are.
It actually doesn't affect the size - it is still 3.5 x 2.5" if you measure lengthwise.
Some collage ACEOs are 'cathedral' shape for instance - flat bottom and arch coming to a peak at top - like a church window - and that is perfectly acceptable - as long as from mid bottom, to mid top is 3.5, and width is 2.5.
Some ACEOs are concertina - several pages that open out. Opened out they aren't 2.5x3.5, but folded they are. And that also is allowed.
As said, I wouldn't offer 'artwork' (painting/drawings) with rounded corners - though might if it resembled a playing card - such as king/queen/jack/joker. Because of framing. However collages sometimes need 'creative' framing, also rounded corners are less likely to damage paper layers - so, as said, I often round these. But there is no hard fast rule.
So giving an option might be best, same as some offer a white border for framing purposes. Although I can understand this, and offered one this way to an artist friend who accepted - others have said to cut it off. For me, I prefer it cut off, as 'it's not an ACEO' (in my mind *lol* - I just had it drummed into my head too much).
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~Jillian
artist, Jillian Crider
... google me!
~Jillian
artist, Jillian Crider
... google me!