Shop irregular curves for drafting, design, technical drawing, pattern making, ship curves, French curves, and flexible curve applications. These precision curve tools help architects, engineers, designers, students, and drafting professionals create smooth non-circular curves, transitions, contours, and flowing line work.
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3-Piece French Curves Set
Alvin & Co.$2.85Features: French curves molded of green-tinted 0.09" thick styrene plasticGreat for individual or classroom useContains French Curve sizes: 5.5", 6.5", and 12.5"Packaged in a convenient, reusable storage pouch -
4-Piece French Curve Set
Alvin Drafting$15.80Alvin Drafting French Curves are an ideal tool for drawing irregular curves and connecting lines and line segments. Use these French curves in manual drafting to draw smooth curves of varying radii.Features: Molded of smoke gray-tinted 0... -
6" Transparent French Curve
Alvin & Co.$2.20Professional quality hand-finished curves of 0.06" thick acrylic. Sizes given are nominal. -
10" Smoke-Grey French Curve - Inking Edge
Alvin Drafting$4.40The Alvin French Curve is perfect for drawing irregular curves and connecting line segments. Its dual inking edges ensure smudge-free, precise results with pencils or technical pens on either side. Made from 0.10" thick transparent... -
10" Smoke-Grey French Curve - Inking Edge-1764695327
Alvin Drafting$4.40The Alvin French Curve is perfect for drawing irregular curves and connecting line segments. Its dual inking edges ensure smudge-free, precise results with pencils or technical pens on either side. Made from 0.10" thick transparent... -
12" Graduated Flexible Curve
Pacific Arc$9.20 - $22.90BulletsFeatures: Graduated sizes: 12", 16", 18", 24".Inches and metric available for any measuring needs.Completely straighten or bend into whatever shape needed.DescriptionFlexible Curves allow for the creation of an infinite number of curves to meet... -
12" Vary form Curve
Fairgate$10.7012" Aluminum English Vary Form Curve.Draws a wide range of curves by simply turning.Practically replaces a set of French curves. Indispensible to the pattern maker and grapic artist.Calibrated one edge two sides.8ths -
12.5" Smoke-Grey French Curve - Inking Edge
Alvin Drafting$4.40The Alvin French Curve is perfect for drawing irregular curves and connecting line segments. Its dual inking edges ensure smudge-free, precise results with pencils or technical pens on either side. Made from 0.10" thick transparent... -
24" Hip Curve
Alvin Drafting$19.65This Hip Curve ruler boasts sharp, wear-resistant graduations for easy readability in both English and metric measurements. Designed for architects, engineers, and mechanical draftsmen, it's suitable for students, hobbyists, and professionals. Crafted... -
24" Irregular French Curve
Alvin Drafting$23.60Introducing the Alvin Drafting 24" Aluminum French Curve Ruler, a versatile tool perfect for drawing, planning, and designing tasks in various fields including drafting and architecture. Its user-friendly design features sharp graduations that are... -
3-Piece French Curve Set
Alvin Drafting$9.20Features: French curves molded of green-tinted 0.09" thick styrene plasticGreat for individual or classroom useContains French Curve sizes: 5.5", 6.5", and 12.5"Packaged in a convenient, reusable storage pouch -
3-Piece French Curve Set-1764364414
Pacific Arc$3.60Collegiate French Curve Set represents the best value in student French curve sets. Curves have smooth edges with inking lifts and are packed in a reusable sleeve.Small French Curve dimension: 5.3" x 2.9" x .12"Medium French Curve dimension: 6.6" x 3.1"... -
5.25" Smoke-Grey French Curve - Inking Edge
Alvin Drafting$2.50The Alvin French Curve is perfect for drawing irregular curves and connecting line segments. Its dual inking edges ensure smudge-free, precise results with pencils or technical pens on either side. Made from 0.10" thick transparent... -
6 Piece Ship Curve Set
Alvin Drafting$29.70This fabricated ship curve set is a must-have for any draftsman, engineer, architect and professional for drawing irregular curves. The set includes six different ship curves. The plastic thickness is 0.08 inch. Alvin has been a trusted name in drafting... -
6-Piece Ship Curve Set
Westcott$23.50This set of drawing templates features six curve guides that suggest the gently bowing and tapered curves of a ship's hull. Whether you are drafting, designing or creating a technical drawing, this curve set is extremely useful.Features: Fabricated from... -
6.5" Smoke-Grey French Curve - Inking Edge
Alvin Drafting$2.90The Alvin French Curve is perfect for drawing irregular curves and connecting line segments. Its dual inking edges ensure smudge-free, precise results with pencils or technical pens on either side. Made from 0.10" thick transparent... -
8-Piece French Curve Set
Alvin Drafting$29.00The most popular full-seized curves molded of smoke gray-tinted 0.10" thick polystyrene with double inking edges. These french curves are great for individual or classroom use!This set contains: FC3361 - 5.25"FC3371 - 6.5"FC3381 - 6.5"FC3391 -... -
8.5" Smoke-Grey French Curve - Inking Edge
Alvin Drafting$4.10The Alvin French Curve is perfect for drawing irregular curves and connecting line segments. Its dual inking edges ensure smudge-free, precise results with pencils or technical pens on either side. Made from 0.10" thick transparent... -
C-THRU 8-Piece French Curve Set - Inkling Edge
Westcott$17.00This French curve set includes eight of the most popular curves. These heavy-weight curves feature a smooth inking edge and allow you to create a wide variety of continuous, flowing arcs and curves.Features: Heavy weight clear plasticSmooth... -
Multiple Curve Template
Timely Templates$7.70Contains 10 sizes of two basic curves 20 in all. Sizes are labeled. Size: 63/8" x 9-7/8" x .020".
Types of Irregular Curves
Irregular curves are precision drafting instruments used to draw smooth non-circular curves, transitions, contours, and connecting lines that cannot be created with a compass or circle template alone. These tools are used in architecture, engineering, fashion design, pattern making, marine drafting, industrial design, technical illustration, and manual drafting workflows.
- French Curves: Create smooth irregular curves, flowing transitions, and connected line segments for drafting, design, and technical illustration
- Flexible Curves: Bend and shape the curve to match custom contours, arcs, patterns, and layout lines for repeatable drawing work
- Ship Curves: Draw long sweeping curves used in marine drafting, hull shapes, industrial design, architecture, and large-format layout work
- Fashion Design Curves: Create garment patterns, hip curves, armholes, necklines, seams, and other apparel design shapes
- Hip & Vary Form Curves: Support pattern making, graphic design, and drafting layouts that require long gradual curves and blended transitions
- Inking Edge Curves: Provide raised or beveled edges for cleaner technical pen work and reduced smudging during manual drafting
- Curve Sets: Combine multiple curve shapes and sizes for broader coverage across drafting, design, classroom, and professional applications
Why Irregular Curves Still Matter
Irregular curves remain important because many technical drawings require smooth curves that are not true circles or simple arcs. French curves, flexible curves, and ship curves help create clean transitions, organic contours, pattern shapes, and blended line work with more control than freehand drawing.
Professional curve tools are especially useful for manual drafting, technical illustration, classroom instruction, garment pattern work, concept sketching, field layouts, overlays, and presentation drawings where accuracy and smooth line quality matter.
Choosing the Right Irregular Curve
When selecting an irregular curve, consider whether you need fixed curve shapes, adjustable curves, or specialized layout curves. French curves are ideal for repeatable smooth transitions, flexible curves are best for custom contours and variable shapes, ship curves work well for long sweeping lines, and fashion design curves are designed for apparel and pattern drafting.
Complete Your Drafting Workspace
Pair irregular curves with related drafting instruments, templates, and drawing tools to create accurate curves, layouts, technical drawings, and design presentations.
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