Robin

For me, I find bigger art to be a better reference for other artists. You can see the details better and it provides us with clearer visuals!

Maybe you could do a Big Art and as an option provide a DP? 

Its also sometimes really hard to fit to fit certain pieces into 160x220! 

Definitely prefer big art with DP crops. 

I like to make a lot of uses with art pieces I buy, like printing them out or using them as backgrounds. 

I personally always prefer large art. But what I've learned sales wise is if you do big art definately offer a dp crop. :>