Going to depend on the lake conditions you fish in, you are much better to go with a larger bag, than to wish you would have went bigger. Some days I don't need a bag, some days I have to put out a third one in the back to control. Next bags I get will be at least the next size bigger. Dave will be able to help you at Dreamcatcher Bait, he has different sizes. The Amish bags are more square and longer than funnel shaped bags. Best to see first hand if you can. I have purchased from Cabela's and a 36" bag is different than what the 36" Amish bag is. Hope this helps.