Vintage Saeki Blue Geo Floral Smocked Dress: 8y?

Vintage blue floral print dress with shirred bodice, white Peter Pan collar, and teal contrast hem. Puff sleeves with lace-trimmed cuffs, back zip.

Made in Japan, believe these were sold at Neiman Marcus. No tag size noted, measures similar to 8y with longer length. 

Flaws: Elastic in sleeve has lost most stretch, couple lighter spots on hem