The wooden bases have a 8cm heel. They run quite small and narrow. Please check measurements carefully as the soles may be different to ones you may have ordered before.
You can measure your feet standing on a piece of paper on a flat hard surface. It is easier if you can get someone to help. Draw around your foot. Now measure from your heel to longest toe. For the correct clog sandal size add on 5mm to 10mm.
SHOE SIZE - Measurements of the wooden base.
UK2 / US4 - 23cm long by 7.8cm at widest toe point
UK3 / US5 - 23.7cm long by 7.9cm at widest toe point
UK4 / US6 - 24.2cm long by 8cm at widest toe point
UK5 / US7 - 25cm long by 8.1cm at widest toe point
UK6 / US8 - 25.4cm long by 8.2cm at widest toe point
The soles have EU sizes stamped on them but they deviate from standard sizing - therefore, I have listed them in UK/US sizes to make it easier to determine your correct size.