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The One-Piece Leo / Swimsuit Pattern
The One-Piece Leo / Swimsuit Pattern
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***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
What Is the One-Piece Swimsuit Pattern Tool?
The One-Piece Swimsuit Pattern Tool is a fully custom, measurement-based drafting system designed to generate your pattern exactly to your body, your fabric, and your design vision. This is not a standard sized sewing pattern. It is a digital drafting tool that builds your pattern from your exact measurements, or from ASTM size tables if preferred, along with your chosen stretch percentage and construction preferences.
You control the details. Adjust strap width. Customize the depth of the front and back neckline independently. Add custom seam allowance for side seams, crotch seams, and arm, leg, or neckline finishes. Whether you are designing for the beach, the stage, or the studio, the structure begins with precise body data and intentional stretch control.
Because MiSlope patterns are generated from your measurements, they eliminate the guesswork of traditional sizing. No grading between sizes. No guessing which size to cut. No stacking multiple patterns to get the right fit. The shaping is built in from the start.
This is not just a pattern. It is a tool.
One tool. Infinite possibilities.
When you can adjust negative ease, design lines, coverage, seam allowances, and construction details within a single drafting system, you are no longer limited to buying new patterns for every variation. You are building from a precision base that evolves with your creativity.
The MiSlope drafting tools allow you to create made-to-measure digital stretch sewing patterns and slopers with complete control. Instead of working around fixed sizes, you draft directly for your body and your fabric.
Precision fit. Total design freedom. No limits.
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
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Pattern Features:
- All custom measurement inputs
- Custom gusset width input
- Custom Negative Ease Inputs. Draft your block exactly for the stretch properties of your fabric! (From shape wear to swimwear you can do it all)
- Hip Guidelines
- Bust Guideline
- Bust Radius Guideline
- Dynamically truued seams
- Accurate redistribution of the Waist to Waist measurement between front and back (No "pelvic tilt" adjustments necessary)
- Custom seam allowance input for side seams and crotch seam
- Custom seam allowance input for arm, leg and neck holes (option for adding binding)
- Adjust Arm Hole Side Seam Length (%) (position below the arm scye where arm hole curve crosses the side seam)
- Customized strap width
- Customized depth of front neckline
- Customized depth of back neckline
- 1 Inch calibration square for projector sewing and printing
- Measurement legend
- Access to the Negative Ease Calculator
- Access to ASTM Missy (Curvy/Straight) Sizing measurement tables from sizes 2 - 20.
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Unlimited Downloads and Lifetime Access to the The One-Piece Leo / Swimsuit Pattern tool for the lifetime of MiSlope.com
The Dance / Swim Bottom Pattern Features
Custom Waist and Leg Hole Seam Allowance
Not all construction methods are made equal. That is why we designed the option to add custom arm hole, leg hole and neckline seam allowance. Want to add binding? Want to fold your seams? Design your pattern with your exact construction method in mind!
Custom Side Seam and Crotch Seam Allowance
Not all construction methods are made equal. Add the exact amount of seam allowance you need for all major seams. The side and crotch seam allowance is set separately for the ultimate customization for construction!
Adjust Arm Hole Side Seam Length (%)
When desigining a pattern from a block, you can position your design lines where you want on the block. With the arm hole side seam length %, you can place your design lines wherever you wish without having to manually do it! The arm hole side seam length is the position below the arm scye where the arm hole curve crosses the side seam.
Front Neckline (Distance Above Bust Line)
We designed this tool with the ultimate customizations in mind. Customize the height of your front neckline to go as high or low as you'd like it.
Back Neckline (Distance Above Bust Line)
We designed this tool with the ultimate customizations in mind. Customize the height of your back neckline, separate to the front neckline, so you can create the ultimate cutomized fit.
Strap Width Customization
Customize your strap width to go from 0 to the full shoulder width. You have the ultimate power to create the design you want!
Guided Measurement Instructions As You Draft
Each measurement input contains detailed written and video instructions on how to precisely take the measurements needed. No Second guessing, we're there every step of the way to guide you through the drafting process.
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No More "Pelvic Tilt" Adjustments
The Dance/Swim pattern accurately re-distributes the waist to waist measurement between the front panel and back panel. No more alterations because there is too much length in the front or not enough length in the back. Draft the perfect fit for your body, everytime.
The One-Piece Stretch Sloper Drafting Tool Includes:
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MiSlope Drafting Tools
Unlimited Downloads and Lifetime Access to the One-Piece Stretch Sloper With Side Dart tool for the lifetime of MiSlope.com
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Updates
Continuous updates to current slopers. Including new features, customizations and more!
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Guided Drafting Process
With measurement instructions for each input, as well as, built in instructional videos. You can measure and draft with full confidence!
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Workflow Interface
Ongoing updates to the workflow interface.
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Measuring Tables
If you want to draft slopers or patterns for ready-to-wear, you will have access to ASTM Missy (Curvy/Straight) Sizing measurement tables from sizes 0 - 20.
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Calculation Tools
We do the math, so you don't have to. With every purchase, you will gain access to all calculation tools like the negative ease calculator and shoulder slope calculator built into the MiSlope drafting tools.
Constantly Evolving
When you become a MiSlope member, you are gaining access to an entire team of design and drafting experts. The MiSlope team is constantly working on developing, improving and adding new slopers/patterns to the library since we believe creativity to be dynamic and ever evolving. The MiSlope library will grow with your creative journey as we add new tools, slopers and patterns.