Regardless of the clay or sculpting material used, sculptures need an interior frame or armature to prevent sagging. Aluminum armature wires are the most traditional yet many artists use metal mesh or even pipe cleaners to brace their scuptures while drying or firing.
Amaco Armature Modeling Wire
Amaco Wireform Metal Mesh
Best Sculpture Wire Mesh for Art Projects –
Amaco Wireform Brass Designer's Fine Woven BRASS Wire Mesh 5ft x
Sculpture House Armature Wire, 1/8-Inch by 20-Feet (907B)
Decorative Mesh 8 - Copper : Wireform : Metals
Wireform Metal Mesh
Art Supplies - Clay & Tools - Armature Wires - Sam Flax Atlanta
Amaco WireForm Metal Mesh