Classi 1/4" HST Marking Ruler 

2" x 12.5"

Take the guesswork out of half square triangles and get perfect results every time with the Classi Creations Classi HST Marking Ruler—your new go-to tool for fast, accurate quilting prep.

Designed with precision in mind, this ruler allows you to mark multiple, perfectly spaced lines in one pass, making HST creation quicker, cleaner, and more consistent. No more shifting rulers or second-guessing your lines—just place, mark, and sew with confidence.

The crystal-clear acrylic design ensures maximum visibility of your fabric, while the easy-to-read guides help you align effortlessly on any size square. Whether you're batch-making HSTs or working on a detailed quilt block, this ruler keeps everything straight and stress-free.

✨ Why You’ll Love It:

Mark multiple HST lines at once for faster workflow

Perfectly spaced guides for consistent, accurate results

Clear acrylic for easy fabric visibility and alignment

Ideal for beginners and seasoned quilters alike

Saves time while improving precision

✂️ How to Use – Classi 1/4" Marking Ruler HST

Step-by-Step Instructions:

1. Layer Your Fabric
   Place two squares right sides together, aligned evenly.
2. Position the Ruler
   Lay the Classi 1/4" Marking Ruler diagonally corner-to-corner across your square.
3. Mark Both Lines at Once
   Using a fabric-safe marking tool, draw along both edges of the ruler to create two perfectly spaced 1/4" seam lines.
4. Sew Your Seams
   Stitch directly on both marked lines.
5. Cut Down the Center
   Cut between the two stitched lines (along the diagonal center).
6. Press Open
   Open your units and press to reveal two perfectly sized Half Square Triangles.