Hello Ann-E and thank you for posting,

The capsule's size is similar to that of a paracetamol capsule.

You can find more information about having radioactive treatment for thyroid cancer on our website.

I hope this is useful, do come back to us if you have any further questions, or if you would like to speak with one of the nurses on the helpline we are available between 9am and 5pm Monday to Friday and the freephone number to call is 0808 800 4040

Jemma