What are the permissible descriptions for raw cotton and linen thread in a contract of forward sale (salam)?
Chapter on Guaranteed Salaf (Advance Payment) for a Specified Term
Al-Mughni
Book of Sales
Primary text
The description of cotton and linen thread must include the region (balad), color (lawn), thickness (ghiladh), fineness (diqqah), softness (na'umah), and coarseness (khushunah). For cotton specifically, length and shortness may substitute for thickness and fineness.