The Paper Size selection includes a large selection of standard paper sizes. If you want, you can create a custom size ranging from 3.5 × 5 in. (88.9 × 127.0 mm) to 8.5 × 14 in. (215.9 × 355.6 mm). You can also choose the borderless setting for specific paper sizes. From the drop-down list, choose the Paper Size you are using.
You can create a custom size by choosing User Defined. Specify the Width and Height values, and enter any name you want for this custom size. Choose the correct paper thickness to improve the quality of your output.
To do borderless printing
From the Paper Size pull down list choose the size of paper you want to print such as Letter (Borderless) .