To decide on the size to cut for your background block you need to multiply the finished size desired by 2 and then add 1/2" for your seam allowance. In the following table there are some measurements that could be helpful to begin:
|
Background Fabric
|
Window Fabric
|
|
|
Finished size: |
Cut a square: |
Cut a square: |
|
2" |
4.5" |
1.25" |
|
3" |
6.5" |
2" |
|
4" |
8.5" |
2.25" |
|
5" |
10.5" |
3" |
|
6" |
12.5" |
4" |