Ahead of that bout both men took part in the WBC's mandated 30 day weigh in, which makes the fighters weigh in 30 days from the bout to make sure they are going to be able to make weight without risking their health. The limit for the weigh in is 10% of the divisional limit, giving the men a limit of 176lbs, which both men made with rioom to spare.
At the weigh in Golovkin came in at 165.1lbs, little more than 5lbs over the divisional limit. The Kazakh was within 4% of the divisional limit. The weight suggests that Golovkin is a small Middleweight, as his team and fans claim, or is alternatively a fighter who simply fights at his most natural weight, and could move down to 154lbs if he wished.
Whilst Golovkin was well under the limit Jacobs did come much closer to the maximum allowed, coming in at 174.8lbs, 1.2lb within the 30 day limit. Although much heavier than Golovkin at the weigh in he is still regarded as the under-dog with many suspecting his questionable durability will be a major issue here.
(Image courtesy of the WBC)