How to create a Sloper/Block from scratch

Plot a half-body grid from scratch to create a sloper or block, using bust, neck, waist, hip, and armhole measurements on a symmetrical bodice.

Plot front and back bodice grids from a half a bodice, then shape the back neck, shoulder, and armhole with a french curve, ensuring symmetry at center front and back.

Add darts and shaping to the bodice sloper, shaping the back and front through waist and bust, pivot shoulder darts into a bust dart to create a room block.

Create a basic sloper on a standard mannequin by outlining one half from center front to center back, then mirror for a full block; mark the shoulder, waist, and armhole.

Drape a sloper on a mannequin by transferring markings, pinning along center front and back, and shaping the bust and hip for a smooth, second-skin block.

Learn to drape a basic front and back sloper on calico, secure with pins, align center front and back, and shape the armhole for a ready pattern.

Mark the fabric sloper on the draped mannequin to transfer waist, center back, center front, shoulder, and armhole lines to paper, using markers or chalk for clear transfer.

Mark and measure the hip, 20 cm below the waist, to guide zipper length, fit, and shaping; transfer the sloper marks to paper with clear front and back references.

Remove the drapes sloper from the mannequin to flatten the 3D form into a basic bodice outline, then pin dots and transfer the front and back bust shapes onto paper.

Transfer the fabric sloper color code onto tracing paper, draft the center front and back grid, and mark waist, hips, neckline, and balance points to create a basic pattern.

Trace and transfer a bodice sloper from dotted lines to paper, ensuring front and back measurements align, mark bust, necklines, darts, and armholes, and prepare a symmetrical block for manipulation.

Transfer the draped bodice sloper onto Manila card, mark and align center front, waist, and side seams, then trace the pattern on one half to ensure a symmetrical fit.

Transfer the sloper onto card by marking key points, ends, and notches, then trace, cut, and align front and back patterns to ensure precise shoulder and armhole fit.