We got our 10,(20 wk old) girls from the hatchery Sept 12- within 3 weeks we started getting eggs-We now get 10 eggs a day faithfully. We've gotten several jumbo size eggs that were double yolkers or had really huge yolks. Today we got a HUGE egg, larger even than our largest Jumbo- we named it Torpedo. Due to the size we decided to do a size/weight comparison of the eggs we're getting. The majority of the eggs we get daily fall into the medium/large/Xlarge category. The 3 eggs on the right, the XL Jumbo and Torpedo were all double yolkers. (Somebody out there has a sore hiney I'm thinkin') I sized them according to what felt right from my many years of store bought eggs. This is in no way official- just my own sizing chart I LOVE GETTING EGGS!
We get extra jumbo often but not every day. I've given up on trying to figure out who lays them. We get extra jumbo eggs in both brown and white. Since your hens are young, it will most likely be a double yoke.
We started out our flock with several red sexlink and they were fabulous producers, with double-yolkers right off the bat and huge eggs even when they first started laying. The two we have left are consistently some of our best producers.