Dear customer, we recommend size 29/30. Our products are already pre-washed, so they shouldn't shrink when washed at home according to the washing instructions. Wash the product once, inside out, on a short program at 30 degrees. For all subsequent washes, you should still use a 30-degree Celsius setting and turn the garment inside out, washing only when the machine is not completely full. It is not recommended to wash the product too frequently. You are not expected to experience any problems for a long time with products washed according to the washing instructions. We thank you for your interest and wish you healthy and pleasant days. 🌿