Sad to sell these knitted Zara overalls because they're just so stinking cute, but my son has outgrown them. Still in great shape! So cozy for your little babe! Blue-grey one is size 9-12 months Charcoal ones is size 3-6months Stretchy knitted material allows for flexibility in sizing though...whether up or down. Let me know if you have any questions! Also, check my closet if interested in more adorable baby Zara/Gap overalls, rompers or Zara knitted sweaters. Cheers! Lauren