Proper Sleeve Length
Sleeves are one of the more expensive alterations but worth the price tag. have the right length is so vital to the desired look of a suit or sport coat.
Lucky for you there is a sure fire way to know that your sleeves are perfectly placed.
As a visual guide, you want a half inch of shirt sleeve showing past the end of the suit sleeve. A mistake many people have is judging the suit length as too long when really their shirt is too short. The shirt sleeve needs to rest on the top of the soft part of the thumb then and only then can you tell if the sleeves are as they should.
Another alternative way is taking a tape measure and measuring from the top of your thumb up 4 inches and that is where the proper sleeve length is. Keep in mind some people may have some crazy short thumbs and need to be considered when taking the measurement.