Are these duck air sacs too big?

[Aliciaduckmom]

I am first time hatching some duck eggs! I have 6 that are day 19 and 4 that are day 17. I’m so nervous. Two of them died already and I really want the rest to make it. I’ll attach where the air sacs are. They look rather big to me but maybe I’m just paranoid?

 

[NatJ]

To me, they look fairly close to the right size.

 

[Motherhenhomestead]

I think they look good! I’ve gotten paranoid too with the air sacs but the egg sizes and shapes play a huge role and can also trick our eyes! Don’t worry you’re doing great! Best of luck with your babies

What breed are they? I’m currently hatching 14 of them, we’re on day 22