Mack Messenger Backpack Pattern by Mackerilla Design
Looking for a bag that does it all? The Mack Messenger Backpack by Mackerilla Design is a roomy, versatile sewing pattern that converts seamlessly from messenger bag to backpack. Whether you’re carrying your laptop to work, hauling books to class, or toting diaper bag essentials, this well-designed pattern has you covered, and looking great doing it.

Why We Love It
- Dual carry options — wear it as a backpack with two adjustable straps, or grab the top handle for a quick-carry messenger style
- Smart front pocket — zippered front pocket sits neatly under a magnetic top flap, keeping your essentials organized and secure
- Generous main compartment — interior includes a split pocket and pencil/pen slots so everything has a place
- Structured silhouette — works beautifully in cotton canvas, oilcloth, or upholstery fabric for a bag that holds its shape
- Versatile enough to use as a diaper bag — the roomy interior makes it a great everyday carry for parents too
Size & Skill Level
Finished dimensions: 12″H × 13.5″W × 3.5″D
Skill level: Intermediate — best for sewists comfortable with zippers, magnetic snaps, and bag construction techniques. Confident beginners are welcome to give it a try!
What’s Included
- Full PDF sewing pattern with step-by-step instructions
- Pattern pieces for all components (body, front pocket, flap, straps, interior pockets)
- Material and interfacing suggestions
- Sizing and hardware guidance
- Instant digital download — no waiting for shipping
Perfect For
- Sewists looking for a practical everyday bag they’ll actually use
- Anyone who needs a bag that transitions from casual to functional
- Parents looking for a stylish diaper bag alternative
- Students and commuters who carry a laptop or books
- Gift-givers — this is the kind of handmade gift people keep forever
Tips for Success
- Interface generously. A structured bag like this needs firm interfacing in the body panels, don’t skip it. Pellon 809 Décor Bond or similar medium-weight fusible works great.
- Test your magnetic snap placement before sewing. Once the snap is installed, it’s hard to move. Lay out your flap and front pocket first to confirm alignment.
- Use a walking foot for the straps. With multiple layers of fabric and webbing, a walking foot keeps everything feeding evenly and gives you cleaner topstitching.
About the Designer
Mackerilla Design is a sewing pattern brand with a signature motto: “Where a good bag is never hard to find.” Known for practical, well-proportioned bag patterns that sew up beautifully, Mackerilla creates designs that are as functional as they are stylish. The Mack Messenger Backpack is a fan favourite that showcases exactly what Mackerilla does best. It’s roomy, clever, and built to last.

