Very lovely classic OP from Innocent World. Full title is Heart Decollete Dobby OP, in a very pretty pale grey-blue colorway.
This is a very comfortable OP, but I have sadly outgrown it. 
Removable waist ties and collar bow, white lace trim on the hem and collar.

Full disclosure: this OP was purchased used and shows some wear. I have re-sewn some buttons (on the sleeves and waist ribbons), as well as patched a very small (<1 cm) hole where a waist ribbon had pulled the button loose. The price reflects the wear. 

Flat measurements:
Bust: approx. 17 inches
Waist: approx. 15 inches
Length: approx. 34.5 inches

Please note that shipping costs are approximate, and will most likely be lower within the contiguous US. If you would like an exact number, please message me.