Size 164 in children's clothing typically corresponds to an age of around 13-14 years old, fitting a height of about 159-164 cm (5'2"-5'4"), but it's best to check specific brand size charts as it's a height measurement, not directly an age. Brands often use 164 for older kids/youth sizes, bridging the gap to adult sizing.
There are 5.381 feet in 164 centimeters.
Does delayed puberty make you taller? It's difficult to predict how delayed puberty might affect your child's adult height. Some adolescents reach an adult height that's shorter than expected based on their biological parents' height. But for other adolescents, delayed puberty doesn't seem to affect their adult height.
Petite clothing is designed to fit women shorter than 164cm to cater for narrower shoulders and shorter vertical proportions. Petite clothing is specialised at the cutting stage of the garment where unique pattern blocks are used compared to the fashion industry standard.
Although baby and kid clothes are often sized by age (newborn, 6-9 months, 2T, etc.), these size labels should simply be used as a starting point. Children grow at different rates, and each child's growth is unique, so keep in mind you may need to purchase a size that doesn't match the child's age.
Y1, Y2, etc. means Youth Size 1. Toddler/little Kids sizes are like 8 - 13...then youth sizes start at 1 - 3 and Adult Sizes start around a size 4.