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How to Use the Bulky Seam Jumper for Consistent Stitches

How to Use the Bulky Seam Jumper for Consistent Stitches

By Madam Sew | Sewing Supplies & Tools Online – MadamSew | Published: 2026-10-26

Category: How-to Guides

Learn how to use the Bulky Seam Jumper to level your presser foot when sewing over seams and bumps, ensuring even stitches every time. Step-by-step guide included.

Quick answer

The Bulky Seam Jumper slides under your presser foot to keep it horizontal when sewing over thick seams, preventing skipped or uneven stitches.

Why a bulky seam jumper matters

When your presser foot tilts over a thick seam, the feed dogs lose contact with the fabric, causing uneven stitch length or skipped stitches. The Bulky Seam Jumper lifts the opposite side of the foot so it stays level, maintaining consistent pressure and stitch quality.

It also works as a shank for sewing buttons with your machine, adding versatility beyond seam leveling.

Step-by-step guide: Using the Bulky Seam Jumper

  1. Step 1: Identify the seam height: Stop sewing with the needle down just before the thick seam or bump. Lift the presser foot and assess how much lift the foot needs to stay level. Checkpoint: If the seam is very thick, start with the 3/16 inch side of the jumper.
  2. Step 2: Place the jumper under the presser foot: Slide the Bulky Seam Jumper under the back of the presser foot on the side opposite the seam. The jumper should rest flat on the bed of the machine, lifting the foot evenly. Common mistake: Placing the jumper under the needle area can bend the needle or cause the jumper to slip. Keep it behind the needle.
  3. Step 3: Lower the presser foot and sew: Lower the presser foot so it rests on both the fabric seam and the jumper. Sew slowly, guiding the fabric evenly. The jumper will keep the foot horizontal as you cross the bump. Checkpoint: If stitches still look uneven, try the other thickness side of the jumper.
  4. Step 4: Remove the jumper after the seam: Once the needle clears the thick area, stop with the needle down, lift the presser foot, and slide the jumper out. Continue sewing normally.

Product used in this guide

  • Bulky Seam Jumper - Get Consistent Stitches When Sewing Over Seams & Bumps: The Bulky Seam Jumper has two thickness options: ⅛ inch on one side and 3/16 inch on the other. You can choose the side that best matches the height of your seam or bump, giving you control over presser foot leveling for different fabric stacks.
    Bulky Seam Jumper - Get Consistent Stitches When Sewing Over Seams & Bumps
    Bulky Seam Jumper - Get Consistent Stitches When Sewing Over Seams & Bumps

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