How to cut styrofoam balls

Written by suzie faloon
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There are many craft patterns available for styrofoam ball projects. The styrofoam balls will need to be cut into halves, quarters or slices for some of the projects you will choose to do. You may even find a project for a hollow styrofoam ball with a diorama or miniature floral arrangement inside of it. It is important to learn how to cut styrofoam balls to save on waste and breakage.

Skill level:
Moderately Easy

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Things you need

  • Sharp knife, short, non-serrated blade
  • Pen or marker
  • Florist wire

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  1. 1

    Place styrofoam ball on newspaper covered work surface. Measure and mark the area that needs to be cut or removed with an ink pen or marker.

  2. 2

    Cut a small area on the ball with the sharp knife. Slice into it and carefully cut away excess.

  3. 3

    Cut the measured marks on a larger styrofoam ball with the sharp knife. Cut straight across the marking of the entire area you need to cut. Go back over the area and cut more deeply until you can remove the piece that needs to go.

  4. 4

    Pick up a piece of florist wire in gloved hands. Place it directly over the centre of a styrofoam ball. Pull the taut wire firmly down through the ball and slice it in half.

  5. 5

    Hollow a styrofoam ball by gently scoring the area with the craft knife. Use a metal baby spoon or similar scooping tool to carve out the interior of the ball. Go slowly to keep the exterior of the ball intact for your project.

Tips and warnings

  • Be careful not to hold a styrofoam ball too tightly when cutting it. You can crush it.

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