When it comes to picking the best-sized shrimp, there are so many options. Shrimp are classified by size. The numbers you see mean the average number of shrimp per pound. 51/60 means there are between 51 and 60 shrimp in one pound. The smaller the number, the larger each shrimp is. 51/60 – small 41/50 – medium 36/40 – med-large 31/35 – large 26/30 – extra large 21/25 – jumbo 16/20 – extra jumbo I used 31/35 size in this recipe. For this recipe, you can use anything larger than that. I wouldn't go any smaller.