Something I didn’t know about when when I bought most of my beehive components is what not all commercial Langstroth frames are made the same. Some frames are slightly narrower than others — those are the good ones. Some are thicker — those can be a pain.
The thicker or wider frames fill a 10-frame brood box right to the edge. Sometimes it’s so tight that removing the first frame during an inspection be can difficult, especially if it’s packed with bees. Narrower frames provide more space on the sides of the box, which gives us sad ole beekeepers a little extra room to wiggle the frame away from all the other frames before we pull it out. For new beekeepers who have never experienced that and always find the first frame hard to pull out, you’re going to love narrow frames. This video shows how to identify them.