Quadra Jeans
Thread Theory Designs

$20.00 each

The Quadra Jeans sewing pattern by Thread Theory Designs provides a subtly modern take on the classic straight leg jean.  This pair of jeans features a slight taper to the leg and extra room in the thigh to allow for lots of movement.  They sit below the waist as a moderate low rise.  Sew these jeans in denim with no stretch or up to 2% elastane to add just that little bit of additional flexibility that so perfectly suits an active lifestyle.

This jeans pattern features all of the traditional details required when sewing denim – add lots of strengthening topstitching, learn to sew flatfell inseams, construct a zipper fly, and apply rivets to high stress areas.  As an added bonus, the waistband is drafted in two pieces with a center back seam hidden under the belt loop.  This construction style allows for very easy fit modifications, even once the jeans are fully constructed.  This is a perfect solution for the home sewist who might like to sew these as a surprise gift or for the wearer with a fluctuating waistline.

The Quadra Jeans pattern is part of the “Parkland Casual Collection” by Thread Theory Designs.  It is a classic garment that lends itself to creating the perfect casual, hand-made wardrobe for an active lifestyle.

The pattern envelope contains a tissue copy of the pattern in waist sizes 26 to 50, a 21 page staple bound illustrated instruction booklet that lays flat while sewing, an embroidered Thread Theory garment tag, and a chip board pattern folder with string closure, which is simple to use and sturdy enough to store your patterns for years to come.

Thread Theory Designs is a Canadian pattern company, and was launched in 2012 by Morgan and Matt Meredith with the aim to bring menswear to the forefront of the DIY fashion movement.

Out of stock

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Make Ideas

Trouser-weight fabrics such as twill or denim are great, or choose a heavy-duty textured cotton for a unique look.  Check out the other Thread Theory Designs patterns we have in stock.

Basic Information

Experience Level


Size Range

hip measure 35" – 57", waist measure 26" – 50"

Design Information:

The Quadra jeans pattern is designed for an inseam length 30 1/2" – 32" depending on size choice. Please see the gallery image for height/size correlation.

What else do I need?

Fabric recommendations: bottom-weight woven fabrics such as twill, denim, or corduroy (9-16oz weight is ideal). For fabrics with more than 2% elastane, you may need to size down. For pocket linings, choose tightly woven cotton or cotton blends.

*See gallery image for fabric amount requirements based on size choice. Additional fabric may be required to match stripes, plaids, or using border prints.

medium-weight fusible interfacing
1 – 7" (18cm) or 8" (20 cm) metal pants zipper (see gallery image for length based on size choice)
1 – 1/2" – 1" (12mm-25mm) metal shank jeans button
6 – metal pocket rivets
topstitching thread
leather or washable paper label for back (optional)

This will work well with …