Our model Emma is a Size 8 wearing a fake bump (although a real bump in the selfie shot!) and is wearing a Size 8. Please note this jumpsuit is quite long in the leg, but has an elasticated cuff which can be tucked under as Emma is doing here (she is 5'3").
Whilst it has nursing access (great if you are pregnant and breastfeeding!) because of the amount of fabric on the bump area it is not recommended for post-partum wear after the first few days.