The formula below works for diamond borders as well as strips in strip quilts.

1. Click QUILT > New Quilt > Vertical Strip (or Horizontal strip).
2. Click the Layout tab, then click the Add or Delete button until you have the number of strips you want.
3. Under Select strip style: select from the following: Diamonds or Half Drop Diamonds.
4. Under Number of blocks along length: choose the number of diamonds you want along the strip.
5. Under Strip size:follow the formula below to arrive at the width.Divide strip length by number of blocks along length.

Divide this result by 1.7320508. (This is the square root of 3). This gives you the strip width.

Multiply by 2 to account for the extra diamond across the strip width (for Double Diamonds and Half Drop Diamonds borders only).

 For example: Strip length: 70” Number of blocks along length: 10 70” divided by 10 = 7 7 divided by 1.7320508 = 4.0414519 Round this to: 4.0415 Strip width = 4.0415
6.  Click Quilt > Quilt Worktable Options > Snap Settings. Under “Palette sliders will jump by:” choose 1/32 inch.
7. Type the strip width size into the Width box. Your diamonds should now be 60 degree diamonds.
8. Click Strip 2 on your quilt.
9. Under Select strip style: select from the following: Diamonds or Half Drop Diamonds.
10. Under Number of blocks along length: choose the number of diamonds you want along the strip.
11. Under Strip size: follow the formula in step 5 to arrive at the width.
12. Type the strip width into the Width box.
13. Repeat these instructions for all other strips in your quilt.
14. Click the Layer 1 tab when you’re ready to set blocks or color into your layout.