Plus Size Jockstrap Im 13 And I Want To Buy A Jockstrap But Only Do Biking, Basketball, Soccer And Lift Weights And Run?

Im 13 and i want to buy a Jockstrap but only do biking, basketball, soccer and Lift weights and run? - plus size jockstrap

I do these activities. I need a jockstrap. I also want to cut half of Wight (£ 180 )!!!. I need help. How large should be and how it would have in (I have a 3-inch d ***)