How big is she going to get before a recast? n/t

She's had two babies without a whole lot of time in between. Give her a break. She's still beautiful.

I saw her during the first week of December, and she has lost a lot of weight from what you see on the last episode of Once that they aired before the winter break. She just had her second son (Hugo) at the beginning of June 2016 (after having her 1st son, Oliver, at the end of May 2014). Each episode takes a week to 10 days to film, and they are quite ahead of what has aired already. She is 38 years old, had two kids practically back-to-back, so sorry if she isn't back to the size she was when filming started in 2011. Ginny has a small round/heart shape face that looks wider than it is, just by gaining a few pounds.

She, unfortunately had A LOT of edema (fluid retention) during and after both pregnancies. The edema is hard to get rid of, due to hormone fluctuations and metabolic changes that take place during and after pregnancy (I am a woman and a doctor, so I am stating from experience).

Her face, neck and shoulder area are almost back to her early 2013 size, if that is so important to you. It's no wonder that so many people in the film industry resort to drugs and anorexia/bulimia, with the attitude that the OP has.
BTW - Ginny does none of that.

I think she kinda look cute chubby, but I do think she should lose some weight soon to portray a beautiful Snow White. Right now she looks like a Snow man. Still Cute tho ^.^