Most items use infant sizing (commonly 0–24 months), so 18 months is generally available within the listed sizes.
Common fabrics are cotton blends and 100% cotton. Listings often show blends such as 60% cotton/40% polyester and fabric types like interlock, gauze, jersey, fleece, and 1x1 rib.
Easy-dress features include crotch or three-snap closures on bodysuits, lap/expandable shoulders, button-front options, and pull-on bottoms with full elastic waistbands or drawstrings.
Most listings recommend machine washing and tumble drying.
Bottoms usually feature pull-on designs with a full or encased elastic waistband; some styles also include a flexible drawstring for added adjustability.