Third shirt released for the 2023/24 campaign in which the Saints compete in Championship following their relegation for the Premier League the previous season. The design of this shirt has been inspired by the club's proximity to the New Forest National Park, a vast area of unenclosed land in Southern England

This chart is intended as a guide so minor deviations can be expected. Length is measured from the top of the shoulder to the hem; width is measured between armpits, or across the waist for pants/shorts laid flat. Measurements are in cm