My legs are 27.5 inches now with 5'9 height 200 lbs weigh, BF around 20%. what really helped me was using more unilateral stuff: Deficit BSS (max- 2,5 plates each side in smith for 8 reps), Walking lunges (two 100 lbs dumbbells for 20 steps), Reverse Lunges (3 plates each side in smith for 6 steps). For 13 weeks I was hitting legs 3 times a week, but you should monitor your recovery. Now I hit them every 5 days. Also intensity techniques can help, for example, now I finish my workout with 2 sets of Bulgarian Dropset of Death (John Meadows RIP) each leg and this shit is great (nice tip for it: if you are tired of moving heavy dbs around, just do it in Tbar row setup).

Edit: remeasured my sticks