didnt matter the depth or size of shiners i was using this morning, flags all day and caught tons of perch. some were monsters but most were avereage size. used everything from medium to XL shiners. had a few perch hit where the shiner was 1/2 the size of the perch. very frustrating seeing as how i have caught many pike in this same area all year round. could have just been the day but oh well......