How to Make a Master Block for Garment Sewing

How to Make a Master Block for Garment Sewing

Nina Redman Sunday, 1 December 2019

A master block, sometimes called a 'master pattern', 'basic block', or 'sloper', is considered the parent pattern from which you draft your garments and drafted to a perfect fit of your model.  The block lacks intricate design details or styling; there are no fancy necklines, pockets, ruffles, pleats, gathers of any kind. The only purpose of a block is to fit the figure or the dress form properly. 

Time saved on first creating a correctly fitting basic block before creating your patterns is critical. Too often, inexperienced designers learn the hard way when an entire design must be scrapped because of the lack of a properly fitted foundation pattern. Developing master patterns, basic blocks, or slopers as some may call them, is also one of the first steps in learning about pattern making and how the flat pattern relates to the 3D body form. 

Following drafting instructions, however, can be an extremely frustrating process, as it's so easy to get lost and make mistakes along the way. In this session, you can follow along with Nina as she demonstrates clear and easy-to-follow drafting instructions for a bodice block.

In this video you'll learn:

  • Step-by-step, how to make a master block for a bodice and sleeve 
  • How to map your model's measurements accurately onto your master block 
  • How to achieve a useable master block that can be used for future designs and scaled for different sizes
  • How to make corrections to measurements on the master block
  • How to use the flexi curve and pattern master to achieve smooth and accurate lines

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Next Lesson

  • Creating a Pattern from a Master Block

    with Nina Redman

    Now that you've created your master block, learn how to transfer it to a functional pattern by adding seam allowance, hems and more. We also explain pattern terms, such as seam allowance, notches and grainline.