I haven't been able to find a chart that shows the average growth in terms of height at withers of a developing lab pupper - full grown doggo. So i'm going to measure Rusty as he grows but unfortunately I didn't start sooner as he is 15 weeks already. OP at full-grown (4 years) is 24 Inches at the withers. Buddy at full-grown (8 years) was 22 Inches at the withers. Rusty at 15 weeks is 17 Inches at the withers. I know that it can be difficult to be precise with measuring this, if you don't train a standing stay, so I understand why the information is less available but if you do have a pupper or a doggo withers height please can you let me know?