What size tacks should I use during upholstery

Improved tacks

Improved tacks are sharp, wide tacks with a large head. Use 3/8" (15-16mm) improved tacks for fastening webbing onto a sturdy frame.

Fine tacks

Fine tacks are sharp, thin tacks with smaller heads than improved tacks. Use 15mm to attach webbing or hessan when the frame is not as sturdy and may split with thicker tacks. Use 1/2" (13mm) tacks for general tacking, thick or multiple fabric layers. Use 3/8" (10mm) for fabrics and linings. Use 1/4" (10mm) for delicate work. Fine tacks are made from steel, zinc or copper.

Gimp pins

Sharp, very thin tacks with tiny heads. Gimp pins are used for attaching gimp braiding or for fine work on delicate frames. Comes in various colours. 

Decorative nails

Upholstery nails with dome heads. Decorative nails are available in various colours, sizes and designs. Used on outside panels where the nails will be visible, or when a decorative elements is wanted. Use a space setter tool to evenly space out the nails. 

Decorative nail strips

Are quick and convenient and can be bent front, back and side-to-side, also called nailhead trim. Decorative nail strips have small holes spaced evenly. A single nail is hammered through those holes to attach the strips to your project. You can cut strips with strong scissors or pliers. 

Steel tacks

Steel tacks are used for general interior upholstery work. 

Zinc tacks

Zinc tacks are less likely to corrode and are used for general upholstery work.

Copper tacks

Copper are mainly used for marine, exterior and antique furniture work.