Is this aircell the right size?

[Maddison]

I'm unsure of age I think its budding on around 13 days now, the chick inside looks sort of between day 13 and 14 on this post, but I could be wrong it honestly looks likes theres more chick than veins. Humidity is between 50-55%, should I try lower? to my understanding lower humidity means larger air cells? its a bantam egg if that matters.

 

[rjohns39]

I'm unsure of age I think its budding on around 13 days now, the chick inside looks sort of between day 13 and 14 on this post, but I could be wrong it honestly looks likes theres more chick than veins. Humidity is between 50-55%, should I try lower? to my understanding lower humidity means larger air cells? its a bantam egg if that matters.
View attachment 1170967

I keep mine between 40% & 45% until lockdown.