This table shows the Compression class levels for medical compression stockings and the compression classes corresponding to appropriate diseases. The compression levels shown in this table is according to the strict German guidelines set by RAL-GZG institute.

COMPRESSION LEVEL*INDICATIONS#
Class 1

18 – 21 mmHg

  • Heaviness and fatigue of the leg
  • Mild varicose veins during pregnancy
  • Mild varicose veins without significant oedema
  • Prophylaxis of thrombosis and embolism for immobile patients
  • Prophylaxis during travel (Economy Class Syndrome)
Class 2

23 – 32 mmHg

  • More severe varicose veins during pregnancy
  • Varicose veins with mild oedema
  • Post superficial and deep venous thrombosis
  • Post sclerotherapy, venous surgery or thermal ablation
  • Chronic venous insufficiency (CVI)
  • Management of healed venous ulcer
  • Prevention of DVT and oedema
  • Post-thrombotic syndrome (PTS)
  • Prevention of PTS
  • Post-traumatic oedema
Class 3

34 – 46 mmHg2

  • Pronounced varicosis with severe oedema
  • Severe chronic venous insufficiency
  • Treatment of active ulcers and recurrent ulcers
  • Severe post-traumatic oedema
  • Lymphoedema
Class 4

>49 mmHg

  • Severe post-thrombotic syndrome
  • Severe lymphoedema

*Compression levels proposed are just indicative and may be changed as to the judgment of the therapist. National regulations may define distinct compression ranges for given compression classes.

# In the US, 30-40 mmHg may be used for post-procedure of a venous surgery or thermal ablation.