Thick Seam Jumper and Quilting Ruler: Sewing Tool FAQ
By Klum House: Bag making kits, bag sewing patterns, waxed | Published: 2026-10-31
Category: How-to Guides
Get clear answers on using a thick seam jumper, a 3x18 quilting ruler for bag making, and thread snips vs scissors. Practical tips for smoother sewing.
Quick Answer
Use a thick seam jumper (presser foot leveler) to glide over bulky seams without skipped stitches, a 3x18 quilting ruler for accurate pattern drafting and marking, and thread snips for quick thread cleanup at the machine.
When a Thick Seam Jumper Saves the Day
A presser foot leveler, often called a hump jumper, is a small tool that lifts the presser foot slightly to help it climb over thick seam intersections. It’s especially useful when sewing bag straps, multiple layers of heavy fabric, or transitioning from thin to thick areas. Without it, you risk skipped stitches, broken needles, or uneven feeding.
Why a 3x18 Ruler Belongs in Your Bag-Making Studio
The 3x18 quilting ruler is a versatile size for bag makers: long enough to draft pattern pieces and draw straight guide marks, yet narrow enough to maneuver around curves. Its transparent body with clear markings helps you align fabric accurately, and the 1/8-inch increments support precise measurements for straps, pockets, and closures.
Thread Snips vs Scissors: Which to Keep at the Machine?
Thread snips are designed for trimming threads close to the fabric, which makes them faster and safer than lifting heavy scissors for every small cut. Scissors still have their place for cutting fabric and thicker materials, but keeping snips within arm’s reach speeds up chain piecing and cleanup.
Frequently Asked Questions
- How do I use a presser foot leveler?
- Place the leveler under the presser foot at the start of a thick seam, then lower the foot onto it. Sew slowly until the foot clears the bulk, then remove the leveler. This keeps the foot level and prevents skipped stitches. Always test on a scrap first to ensure the leveler fits your machine.
- Can I use a 3x18 quilting ruler for bag making?
- Yes—it’s ideal for drafting pattern pieces, drawing strap placement lines, and squaring up fabric. Its 1/8" markings and transparent body help you measure and mark accurately. Use a rotary cutter with a self-healing mat for clean, straight cuts.
- How to sew over thick seams without breaking a needle?
- Use a presser foot leveler to lift the foot over the seam, reduce your stitch length slightly, and turn the handwheel manually to ease the needle through the first few stitches. This reduces strain on the needle and improves stitch quality. Choose a needle suitable for heavy fabrics, such as a denim or topstitch needle.
- Thread snips vs scissors: which should I use?
- Use thread snips for trimming threads at the machine—they’re quick and precise. Reserve scissors for cutting fabric and thicker materials. Keeping both nearby streamlines your workflow. Keep snips within arm’s reach to avoid unnecessary movement.
- What size quilting ruler is best for bag making?
- A 3x18 ruler is a great all-purpose size: long enough for drafting and squaring up, narrow enough for detailed work. Many bag makers also keep a smaller square ruler for tight corners. Consider the types of bags you make—larger bags may benefit from a longer ruler.
Tools That Make These Answers Practical
- Thick Seam Jumper - Presser Foot Leveler: Presser-foot leveler for smooth, skip-free sewing; also called a “hump jumper”. It helps your machine glide over bulky seams, reducing skipped stitches and broken needles.
Thick Seam Jumper - Presser Foot Leveler - 3" x 18" Quilting Ruler: 3" x 18" quilting ruler by Omnigrid with 1/8" markings and transparent body. Its size and clear markings make it ideal for drafting bag pattern pieces and drawing precise guide marks.
3" x 18" Quilting Ruler - Basic Thread Snips: High-quality, industrial metal thread snips. They stay sharp and are always within reach in the Klum House studio for quick thread trimming at the machine.
