Amazing. Some parts it sounded like the chicken toy but this was really amazing since it's really hard to play in tune and even make a decent sound using a very small violin.
NaKa Ji if you play on a violin that is the wrong size, it not only negatively impacts projection and intonation and general sound, but you can quickly develop bad technique, posture and left hand muscle memory. so yes, go ahead and overestimate size if you have to.
by that measure the "violinists" are actually holding a cello on shoulder and "cellists" are actually playing double bass :D (if only humans are bigger)