Hello Matt Whitaker, if you measure the chest size is 37 inches already, then you can order size Male L. But please also measure and check the shoulder width, waist & hip size to see if Male L size fits you. The weight is mainly for our tailor checking the costume proportion for standard size costume.
Actually, we always welcome customer ordering custom size as that will make sure the costume better fit customers. You can simply select the 'custom size'and fill up your exact body size, and our tailor will adjust the costume size to fit you. n_n
*Custom size costume doesn't charge extra cost, but the processing time will be longer than standard size costumes; for this costume in custom size, we need about extra 1-2 weeks to make it (excluding the shipping time).