Drill holes

Drill holes are small holes in a pattern (which can be transferred onto the fabric when cut, with chalk, two pins in a cross - so that where the pins intersect indicates the placement of the hole, or a small stitch) often used to indicate a dart point. 

As you can see in the example above, when marking a drill hole at the tip of a dart it is a good idea to mark it 1 - 1.2cm back from the dart point, so that when the dart is sewn the drill hole is hidden inside the dart. You just have to be sure to remember this when sewing the darts, so that, when finished, they are the right length!

Drill holes can also be used to indicate other design features, such as the location of patch pockets or belt loops (any feature that is located in an area where you are unable to notch a seam).