A new set of FEI regulations were introduced in 2020 in relation to the measuring of Eventing ponies, you can read more about this here: https://www.horsesportireland.ie/wp-content/uploads/2019/11/FEI-General-Assembly-Report-Pony-Measuring-2020.pdf
To compete at international level your Pony must be FEI registered, and newly FEI registered ponies must be 148cm (149cm with shoes).
Your pony must be measured at an FEI Official Measuring, there is typically one every year in Ireland, usually taking place in January or February. You can read more about this on the Pony Measurement page on the HSI website here: https://www.sji.ie/Ponies/Measuring-Venues
