Basically I used to prescribe to the old 'presses and rows are enough for arms' nonsense, and although that may partially be true about triceps, I have found it definitely isn't for biceps.
I squat 135kg, bench 100kg, deadlift 190-200kg, but only have 12.5 inch arms! I have started my regulation summer cut and have never properly trained biceps. With something like a superset 3x12 on one or both upper body days, as well as a specific arm day with 8 sets each for triceps and biceps, is it unrealistic to expect an inch or more on my arms by the end of the summer, with them being relatively untrained, with an increased load?