Those are the number of units I count on graph paper to make the grid to draw the star.
The "actual" ratios for a LeMoyne star grid are 1.000, square root of 2 divided by 2, square root of 2 divided by 2, and 1.000.
The numbers that go with that are 1.000, approximately 0.707, approximately 0.707, and 1.000
Using the numbers of 7, 5, 5, 7: 5 is approximately 0.714 of 7, which is a close enough approximation (for me) to 0.707 for the drafting I do of this type of design.