(Reuters) - Zalando returned to growth in the first quarter, the German online fashion retailer said on Tuesday, as it improved the quality of its assortment and added logistics partners.

Quarterly gross merchandise volume (GMV) - a key revenue metric measuring the total value of all goods sold - rose 1.3% to 3.27 billion euros ($3.52 billion) from 3.23 billion in the same period last year, the company said.

($1 = 0.9291 euros)

(Reporting by Linda Pasquini)