This is a standard sizing chart that will allow you to get the best possible fit on all your workwear

AlphaJacketWaist
X-Small2824
X-Small3026
Small3228
Small3430
Medium3632
Medium3834
Large4036
Large4238
X-Large4440

From here sizes on conti suits, shirts and other workwear could have a rise per Size, which means with each bigger size the price will increase

AlphaJacketWaistIncrease
X-Large4642+10%
2X-Large4844+15%
2X-Large5046+20%
3X-Large5248+25%
3X-Large5450+30%
4X-Large5652+35%
4X-Large5854+40%
5X-Large6056+45%