Great job. They are both great.

How do you determine what size to cut the squares part of it? Is it determined by rectangle size? Is there a chart?
Sure am needy aren't I? LOL

I read in one of my quilting reference books, you decide what size you want your finished block to be. For the long stripe you add a half inch to length & width, so 2in x 4in finished, would be a 4.5 & 2.5 cut. The blocks would then be 2.5 squares. This would give you a 2in by 4in flying geese block. I think I wrote this right, lol, feel free to correct if not..
I am still debating on that ruler, read some pros & cons about on one google link. If you have more good things to say about it, please do!

I'm slow too. It took me a minute then the light went on. The square is the size of the short side....squared???? Is this what you said?

VERY NICE

Good job

I use Eleanor Burn's method/ruler which is very accurate. I'm going to look into this other method, too.

Yes, your long piece is 4.5 by 2.5, so, for this size your squares would be 2.5. Make sense, hope so, if not, ask till you do understand, okay! Only way to learn. Another thing you can do is a google search, & type in, how to make a flying geese block. You might find more info, & pics there, okay! Hope this helps. I know it can get confusing...

This method is good for stacking them all together, if that's what your pattern calls for....

Your squares need to be half the size of whatever size rectangle you use.