Here’s a classic trouser shape that’s bound to last for years and years.

The Regular Fit Trousers have a high waist and straight, full-length legs. They feature side slant pockets and a left side zipper opening.

This basic pattern is The Assembly Line’s most adjustable pattern. You’ll be guided in how to raise or lower the rise, change the waist width, adjust the mid-front allowance and alter the length - all depending on your own fit preference.

This is a multi-size pattern that comes in two size ranges, including either XS-L or XL-3XL.

These trousers are straight with a high waist, so use your waist and seat measurements for sizing. The assembly instruction includes guidance on how to adjust the waist, rise or length if needed.

Seam allowances are included in the pattern. Body measurements shown in the images alongside.

Model is 170 cm tall and wearing a size S.

Photos: The Assembly Line