[M size (6 to 8.5 kg  3 months to 6 months) d. Penguin]

[M size (6-8.5kg  about 3-6 months) c. Yozora]

[M size (6-8.5kg  3 months-6 months) b.Beige]

[M size (6-8.5kg  3-6 months) a.Gray]