Circumference

• A – A’ : circumference of the lower ribs (so that the lumbar state does not end up under the ribs when seated).
• B – B’ : circumference of the waist; the narrowest part of the upper part of the body; in principle at the navel
• C – C’ : circumference to the hip crest
• D – D’ : circumference in relation to the widest part of the seat.

Back height :

• E – F : upper side (at the level of lower shoulder blades or women’s bra strap) to waistline
• F – G : waist to bottom (always up to 2 fingers above seat line)
• E – G : total back height

Height abdomen :

• H – I : upper side to floating ribs to waistline
• I – J : waist to pubis/pubis without discomfort in the groin while sitting
• H – J : total height of the abdomen

Points of attention for :

• Drivers : leave it at the “pass” to avoid disturbance in the groin and on the lower ribs.
  Elderly ladies : often a lack of abdominal muscles; therefore, insist not to always wear the lumbo state in order not to make the abdominal muscles lazy.