Slide fastener with flat elements

A slide fastener comprising:

• a pair of first and second stringers each comprising a tape and a row of coupling elements mounted on a longitudinal edge of the tape, wherein:
• each of the coupling elements comprises a first non-connecting portion at an upper side of the tape and a second connecting portion at a lower side of the tape,
• the second connecting portion comprises a head portion and a body portion,
• the head portion is engageable with a head portion of opposing coupling element,
• the body portion is fixed to the tape,
• in a direction perpendicular to a longitudinal direction of the first and second stringers, the second connecting portion is longer than the first non-connecting portion by an amount equal to substantially the size of the head portion of the second connecting portion,
• a shape of each of the coupling elements of the first stringer is identical with a shape of each of the coupling elements of the second stringer,
• the first non-connecting portion of each of the coupling elements is substantially square,
• in the longitudinal direction of the first and second stringers, the length of the head portion is less than the length of the body portion and the length of the head portion is less than the length of the first non-connecting portion, and
• wherein each of the coupling elements is fixed to the tape by clipping the tape between the first non-connecting portion and the second connecting portion.