I was looking for a Strap for my Son. He is 165cm tall and was a little afraid that the Children Strap will fit but it's the right size and I think it will fit also if he grows to 180cm. He has a slim build. The Strap is easy to adjust but I thik a little too easy, so he has to adjust it every Time he plays his Alto. During the playing the Strap stays in the right length so it is not a Problem. Building Quality is good too.