This will depend upon how many months remained in your subscription.
For example, an individual who started their 12 month subscription in February 2021 would have 2 boxes remaining after the December box. They would be refunded for 2 months of the subscription as a result.
Please note that 6 and 12 month subscription are valued at $58 and $52 a box respectively, whereas the monthly boxes are valued at $65 a box.
Your refund will reflect this.