momme
The closest english pronunciation would be 'mummy' It is abreviated mm
The measure used to describe the weight of silk. Originally Japanese in origin and defined in traditional Japanese measures, for more practical purposes it may be considered to be the weight in pounds of a one hundred yard length at 45 inches wide of a given fabric. Aother, and perhaps easier, way to look at it is an 8mm silk is approximately equal to one ounce per square yard.
Silks in excess of 40-50mm are seldom available from retailers, though gauzes as light as 2-3mm are fairly easily found. Most garment silks are in the range of 8-20mm. Heavy silks for example, brocades, noil, and raw silks, generally are between 30mm and 45mm.