Instruct: Classify an Amazon review as either positive or negative.
Query: Size Matters

Great product, performed as expected and performed very well. Only drawback is the cuff is too small for my arm. 30 readings at home were all 20 points greater than what the nurse and doctor read 3 times in the office, and the practice had just had their BP equipment calibrated that week. Now seeking to find a larger cuff as an accessory.