No - customs duties are not included in the shipping cost for orders going to Saudi Arabia.
We ship all of our orders from the UK so any orders shipped outside of the EU (with the exception of US, Australia, New Zealand and UAE) may be charged custom duties.
If you are shipping to Canada, it will be stated in the checkout that you will have to pay custom duties.
The recipient of the order will be required to pay any applicable charges prior to receiving their goods. As these custom duties are governed locally we’re unable to advise of these costs before purchase.