Engineering drawing frame border size
The size of the drawing border (or Engineering Drawing Frame) on your technical drawings is covered in BS EN ISO 5457.
The BS ISO standards require a 20mm border to the left hand edge (for filing) and a 10mm border round the other three sides of the drawing sheet.
Click Size and Layout of Engineering Drawing sheets for more on grid reference frames and paper sizes.
For more information on engineering drawing layouts check out the Technical Drawing Standards Page!