Babies typically wear 0 to 3 month clothing for the first few months of their lives. However, the exact length of time a baby will fit into this size can vary depending on their individual growth rate.
Old Navy and Baby Gap provide a general guideline for the weight and height/length measurements corresponding to their label sizes. According to their sizing charts, the 0-3 month size is suitable for babies weighing up to 12 pounds and measuring between 19-23 inches (Old Navy) or 18-23 inches (Baby Gap).
In terms of weight, babies usually reach the upper limit of the 0-3 month size around 12 pounds. However, it’s important to note that some babies may outgrow this size sooner if they have a higher weight gain rate or are born larger. Conversely, smaller infants may be able to wear 0-3 month clothing for a longer period.
When it comes to height or length, babies typically transition out of the 0-3 month size when they reach around 23 inches. Again, this can vary depending on the individual baby’s growth rate. Some babies may reach this height earlier or later than others, and it’s important to consider their overall body proportions as well.
It’s worth noting that different brands may have slightly different size ranges, so it’s always a good idea to consult the specific sizing charts provided by the clothing manufacturer. Additionally, keep in mind that babies’ growth can be unpredictable, and they may experience growth spurts at different times.
It can be helpful to have a range of sizes on hand, including newborn and 3-6 month clothing, to ensure that you have options as your baby continues to grow. Pay attention to your baby’s cues and the fit of their clothing to determine when it’s time to move up to the next size.
In my personal experience, my daughter wore 0-3 month clothing for about two and a half months. She was born on the smaller side and had a slower weight gain rate. By the time she reached 12 pounds, her onesies and sleepers were starting to become snug, indicating that it was time to transition to the next size. Every baby is different, so it’s important to monitor their growth and adjust their clothing accordingly.