This is helpful :)

• Cuban heel: A stocking with a heel made with folded over and sewn reinforcement.
• Demi-toe: Stockings which have a reinforced toe with half the coverage on top as on the bottom. This results in a reinforcement that covers only the tip of the toes as opposed to the whole toe. These can be with or without a reinforced heel.
• Denier: The lower the denier number the sheerer the garment. Stockings knitted with a higher denier tend to be less sheer but more durable.
• Fishnet (material): Knitted stockings with a very wide open knit resembling a fish net.
• Fencenet: Similar to fishnet, but with a much wider pattern. These are sometimes worn over another pair of stockings or pantyhose, such as matte or opaque, with a contrasting colour. Sometimes referred to as whalenets.
• Full Fashioned: Fully-fashioned stockings are knitted flat, the material is then cut and the two sides are then united by a seam up the back. Fully-fashioned stockings were the most popular style until the 1960s.
• Hold-ups or Stay-ups: Stockings that are held up by sewn-in elasticated bands (quite often a wide lace top band). In the US they are refrred to as thigh-highs.
• Knee-Highs: Stockings that terminate at or just barely below the knee. Also known as half-stockings, trouser socks, or socks.
• Matte: Stockings which have a dull or non-lustre finish.
• Mock seam: A false seam sewn into the back of a seamless stocking.
• Nude heel: Stockings without reinforcement in the heel area.
• Opaque: Stockings made of yarn which give them a heavier appearance (usually 40 denier or greater).
• RHT: Abbreviation of reinforced heel and toe.
• Open-toed: Stockings that stop at the base of the toe with a piece that goes between the first and second toes to hold them down. They can be worn with some open-toed shoes, especially to show off pedicured toes.
• Sandalfoot: Stockings with a nude toe, meaning no heavier yarn in the toe than is in the leg.
• Seamed: Stockings manufactured in the old Full-Fashioned manner with a seam running up the back of the leg. In the past they were manufactured by cutting the fabric and then sewing it together. Today stockings are generally fully knitted and a fake or mock seam is added up the back for a particular fashion look.
• Seamless: Stockings knit in one operation on circular machines (one continuous operation) so that no seaming is required up the back.
• Sheers: Stockings generally of a 15 to 20 denier.
• Thigh-Highs: Stockings that terminate somewhere in the mid-thigh.
• Ultra Sheer: A fine denier fiber which gives the ultimate in sheerness. Usually 10 denier.
• Welt: A fabric knitted separately and machine-sewn to the top of a stocking. Knit in a heavier denier yarn and folded double to give strength for supporter fastening.