So i previously had a PO 2500 and that was 42mm x 14mm if I remember correctly. I am currently chasing my diver/casual grail which is the GS SBGA031. The SBGA031 on paper is too big for me at 44.2mm by 14mm. However it has curved lugs and wear small according to other owners. In my opinion the PO wears big. This leads me to believe that these 2 watches should wear similarly (size wise). I am hoping someone may have experience with two or even better, have both at the moment and can provide insight/pictures. Thanks in advance!