Are you referring to packing the tube? I don’t know that this is the “best” way to gain girth. The benefit of packing the tube is that it promotes more even gain of growth. Some guys need it, others dont.
I’ll share a truth with you about pumping: when starting out you may think that one tube is all you need, and in reality it is, but one day you’ll open up your drawer and see 2 or 3 (or 4) different tubes there.
Too large a tube can work but requires more effort to use it, too small and may out grow it too quickly. Have you reviewed the guide to sizing a cylinder? It is a good resource to check with. Use your largest girth (glans or shaft) for the sizing.
Selecting Your Cylinder Size
Initial: 7” BPEL; 6” NBPEL; 5.25” - 5.5” MEG
Current: 7-7/8” BPEL; 7-3/8” NBPEL; 8.5” BPFSL; 6.5” MEG; 6”x5” Flaccid.
Goal: Improved/consistent EQ while managing ED. Secondary: maintain current stats.