Flying Geese size

I was going to title this "does size matter" but was afraid it might attract the dreaded spammers again! I have a question.........I'm getting ready to make a quilt with flying geese - where the block is made up 3 flying geese and you put 4 blocks together (4-patch style) with the 3-geese blocks pointing in different directions, sort of going in a circle. There's a name for this block but it escapes me at the moment. This will be a queen size quilt. I'm debating on whether to make the 3-geese units 6 x 6 (each goose being 2 x 4 and a 2" strip on either side) or 12 x 12 (each good being 4 x 8 with the 2" strip on either side). Is a 4 x 8 goose too big? Is there some kind of "rule of thumb" about how big flying geese should be? You know, like when you make a log cabin the logs shouldn't be too big or it doesn't look right. I made a 2 x 4 sample with the fabric I'm using, then I made a 4 x 8 and it looks way oversized, but I don't know if it's because I'm used to looking at the smaller size. Any guidelines??? Thanks, NancyH