I have 38mm and I live in Europe... Here a lot of them spring bands are already selling out... So if you live in the US, I highly recommend you to grab the bands you like when they're available.
These are the spring colors that are already sold out here:
Sport Loop: All 4 colors of spring
Nike Sport Loop: Midnight Fog, Cargo Khaki
Sport Band: All 3 colors of spring
Nike Sport Band: Black/White 38mm, Cargo Khaki/Black, Barely Rose/Pearl Pink
Woven Nylon: Pink Stripe 38mm, Blue Stripe 38mm, Gray Stripe 42mm
Since they're marked as "Sold Out" here, I suppose they would sell out in other markets sooner or later, and eventually all these colors would disappear in autumn. (Just my opinion from past experience, still regret that I missed out the Blue Orbit/Gamma Blue, which is nowhere to be found now)