What a find! I completely stumbled across these on my semi-regular retailer search for Batman Arkham merchandise.
Rubies have been making officially licensed costumes for decades and strike the balance between a decent resemblance and a decent price pretty well.
The really interesting thing here is that while they’re listed as Arkham City replicas, some of them clearly aren’t.
The deluxe and standard long sleeved Robin matches the Play Arts Kai and Multiverse Arkham Knight Robin figures perfectly. Both the Batman shirt and costume definitely have the same angular armour on the abs as the Arkham Knight batsuit.
Anyway, check them all out below. Pretty reasonable prices too!