The quilted cow I did was all finished 1" squares .... and a lot of them had several pieces within. Finished size was 21x27 (if I remember correctly.)
It became a labour of love, and somewhat of a personal challenge. My patience, attention to detail and endurance grew throughout and I learned I could indeed do it ... and as a result, most anything I put my mind to.
Here's the link ...
http://www.quiltingboard.com/t-114217-1.htm
Biggest thing to remember was I could not work on it unless I was in a good frame of mind and was totally with it!!! :)
So, don't hesitate about it ... take it on with no deadline and you'll be glad you did!
Note: I believe that OP has not stated whether this is a mini quilt or a regular quilt with some 1" pieces in it. Totally different in the possibilities.