How to draft a Sheath Skirt Sloper

These pattern drafting instructions were given to me by a student who attended the Traphagen School of Design in the 1980s. It was a private design school in New York City. The instructions are very simple when you take the time to read them through before you start drafting your pattern. Make a muslin to test the fit before using this as the basis pattern for any pencil skirts or other designs based on the basic skirt sloper. The basic sheath skirt (a/k/a pencil skirt, slim skirt, wiggle skirt) has not changed. This pattern can serve as a sloper for vintage or modern skirt designs.

Measurements Needed

Center Back Length (from center back waist to desired length of skirt)
Center Front Length (from center front waist to desired length of skirt)
Back waist measure (from side to side seam at back)
Front Waist Measure (from side to side seam at front)
Hip Measurement – 7 to 9 inches below waist-use widest circumference.  Add 2″ of ease to measurement.
Lower Edge of Skirt (this measurement is determined by the hip circumference plus 2″ ease

Important Note:  Look at the complete diagram.  The rectangle runs from point A back to point A front at waistline.  Point B back runs to point B front.  Point A to B in the back and Point A to B in the front is the skirt length.  I found it easier to start with a large rectangle where A-A and B-B equals the complete hip measurement plus 2 inches of ease.  So draw A-A for the waist.  The draw A to B for center back.  Draw B to B for lower edge.  Then from B in lower edge of front draw a straight line up to A front.

Then proceed to step 2.

1.   Draw a line from A to B equal to desired length of skirt measurement.

2.   Square a line up from A and B equal to 1/2 ofequal to 1/2 of B (lower edge) and mark center C.

3.   A to D is 7 to 9 inches below waistline.  This is the hipline level.  Connect D on center back to D on center front.  Mark Center E. 

4.   Measure from point A at center back to 1/2 of back wait measurement plus 1 1/2 inches for two waistline darts.  Mark point F.

5.   Measure from point A at center front to 1/2 of front waist measurement plus 1 1/2 inches for two waistline darts.  Mark point F.

6..   Square a line up 1/2 inch from point F to G on both front and back.  Mark point G. 

7.   Shape curve of hip from point E to G on back and front.

8.   Shape front waistline from A to G.  Shape back waistline from A to G.

9.   Plan the position for a 3/4″ wide dart to correspond with the waistline dart position of the back bodice*.  Make dart 6 inches long.

10.   Plan the position for the second dart 3/4″ wide and 5 inches long.  This dart should be the center from the end of the first dart and the side seam at the waistline.

11.   Plan the position for a 3/4 inch wide dart to correspnd with the waistline dart position of the front bodice*.  Make dart 4 1/2″ long.

12.  Plan the position for the second dart 3/4 wide and 4 inches lont.  This dart should be the center from the end of the first dart and the side seam at the front waistline.

13.   Cut out sloper.  This sloper must have 1/2″ seam allowances added at waistline, side seams and center back.  Add hem allowance at bottom of skirt.  The hem for the basic skirt is usually 2″

Free Pat Perkins 1950s inspired Repro Dress Pattern

Introduction

Left: First sketch. Right: Finished dress.

I am releasing my pattern for the Alice Elizabeth dress into the public domain. You are free to download and size it up or down in a graphics program. You can alter the design. I also give permission to use it privately or commercially.

This is a basic pattern that you can use as the basis of your own rendition of the style.

Please refer to the following posting for further details and as a guide to whether or not you want to make the dress with closures like I used or that are on the original 1950s dress.

Pat Perkins Everyday/House Dress Circa 1950s – Analysis

Alice Elizabeth dress – Construction details on my interpretation of the Pat Perkins dress

This pattern was created using a combination of draping and flat pattern making based on the 1947 technique, Precision Draping. A Wolf Form in Misses 8 was used. The resulting dress can be labelled a Misses 6/8.

The pattern is showed on a cutting mat using inches. All pattern pieces do not have seam allowances.

Bodices

Front Bodice
Back Yoke and Bodic

Six-gore Skirt

Frong of six-gore skirt.
Back of six-gore skirt

All-in-one sleeve

All-in-one sleeve

Top collar, under collar, front interfacing

Top collar and bottom collar.
Interfacing front bodice and skirt.