Check to make sure the paper size for your new label is listed in the drop down list of choices. If the paper size you need is not listed you may add it by pressing the Custom Paper List button on the bottom left of the Add a New Label Screen. If you paper size is listed select it and put in the name for this label, check the paper size, complete the measurement boxes, number of labels across and down, press Save to save your label and return to the Label Selection Page.
For detailed Custom Label
and Paper Size instructions.
You will find all popular label dimensions in most word processing programs or use a ruler to measure. In MS Word they are listed under Envelopes and Labels.