what is the normal ring size for  an infant
Still, infant growth tends to follow a fairly predictable path. Consider these general guidelines for infant growth in the first year: 1  From birth to age 6 months, a baby may grow 1/2 to 1 inch (about 1.5 to 2.5 centimeters) a month and gain 5 to 7 ounces (about 140 to 200 grams) a week.