Hi, we have added the A4 pattern for our European and Asian customers who use different paper size. You can ignore the A4 pattern and just use the normal one. I hope this wasn't too confusing. You should print out the pattern in actual size, do not shrink to fit or add any other options that may alter the design. After you have printed it, you should piece the pattern together like a puzzle and tape it in place. Then you can finally cut the pattern following the pattern line.