Desizing is the process of removing the size material from the warp yarns in woven fabrics. Sizing agents are selected on the basis of type of fabric, environmental friendliness, ease of removal, cost considerations, effluent treatment, etc.

The major desizing processes are:
1. Enzymatic desizing of starches on cotton fabrics
2. Oxidative desizing
3. Acid desizing
4. Removal of water soluble sizes