Aside from thread and needles, there are many components that go towards a great dressmaking outcome.
Amongst these are:
Boning - We have Poly Boning in two widths 8mm & 12mm and two colours White & Black
Boning was originally made from bones whittled down to fit within slots in a garments. These slots or casings contained the bone, giving the garment support and also, holding in the person wearing the garment.
Today boning is used for structure where a shape needs to be maintained such as dresses and indeed bags.