The Open Back Leo Pattern

***After you purchase your sloper, you can access your tool in the MiSlope Drafting Library. NOTE: You must create your account using the same email used for purchase.

**Unlimited downloads
*Lifetime access to the Princess Seam Block tool for the lifetime of MiSlope.com

Draft your pattern using your custom measurements or our built-in ASTM size tables (or both) and generate unlimited variations of your pattern for life. One price, lifetime access, and endless design possibilities from a single tool.

Open Back Leotard Tool

The Open Back Leotard Tool is a fully custom, measurement-based drafting system designed to create precision-fit open-back leotards with professional performance structure. This is not a fixed-size sewing pattern. It is a dynamic drafting tool that builds your pattern from your body data, stretch percentage, and design preferences.

Whether you are designing for dance, swim, competition, or fashion bodysuits, the tool gives you full control while maintaining balanced shaping and stretch logic throughout the garment.

Create your own custom open-back leotard pattern that combines precision fit, performance comfort, and endless design possibilities. Whether you’re drafting for dance, swimwear, or everyday bodysuits, this tool lets you control every detail while maintaining a professional finish.

Key Features

• Adjustable Back Cutout: Control the depth and endpoint of the open back for anything from a modest scoop to a dramatic low-back design.

• Gape Fix Option: Eliminate unwanted gaping at the back curve with automated pattern rotation. Toggle between a seamless or center-back-seamed design for the best tension and fit.

• Strap Width Control: Easily switch between a halter-style neckline or a full-shoulder coverage.

• Neckline Adjustments: Modify neck ease to create a snug high neck or a wider boat neckline, compatible with the MiSlope Collar Tool for high-neck variations.

• Coverage Options: Choose between straight or contour back coverage for performance or everyday wear.

• Fully Integrated Measurement Logic: Built-in ASTM Missy Curvy, Missy Straight, Girls 8-20 size tables OR draft from measurement profiles. You can also manually input all your measurements.

• Leg Line and Armhole Customization: Adjust leg height, armhole depth, and side seam percentages for comfort and movement.

• Seam Allowance Flexibility: Independent controls for main seams, armholes, leg openings, and back closures—ideal for binding, fold-over finishes, or coverstitch adjustments. YOU CHOOSE YOUR SEAM ALLOWANCE!

• Tiled Printing System: Cleanly labeled pages (row and column indicators) for faster taping and cutting.

Perfect For

• Dance and performance costumes

• Competitive swimwear

• Activewear or fashion bodysuits

The Open Back Leotard Tool is designed to help you explore variations, test tension, and fine-tune your pattern in real time, giving you near-infinite combinations from a single base design.

Works Across Kids, Teens, and Adult Sizing

MiSlope is designed to grow with the wearer. In addition to drafting from custom measurements, the tool includes built-in ASTM sizing tables so you can generate patterns even when exact measurements are not available.

Draft using ASTM Girls sizing tables (sizes 2–20) for children and youth garments, making it ideal for dancewear, swimwear, skating costumes, and growing bodies where consistent sizing is needed.

For teens and adults, you can draft using ASTM Missy Straight or ASTM Missy Curvy sizing tables, allowing you to start from an industry-standard proportion set while still maintaining stretch-specific drafting and negative ease control.

Whether you are sewing for children, teens, or adults, MiSlope provides a consistent drafting foundation across size ranges, so you can design once and scale confidently without switching pattern systems.

Printing Features

• Dynamically tiles your pattern into A4 compatible files so you can print your pattern like a regular PDF using your home printer
• 1 inch calibration square to ensure your pattern is printed correctly to scale

Projector Sewing or Vector Drafting Compatible

• Open your one-page canvas and use it directly with your projector, or open it in your vector drafting software of choice to continue drafting and design work
• 1 inch calibration square to ensure your pattern is projected correctly to scale