I use the 50" panels from Tractor Supply, catch them on sale for $18 each. I usually take bolt cutters and rip one panel down the middle (gives me 2-25" panels) and arrange my pen where the far and near side facing the stand is the lower 25" height (deer walk around to front or back to jump in, clear shot without panel in the way) but I place a cinder block under each end to hold up while wiring to T-posts (both ends and middle) and they end up about 34" and I leave the sharp cut ends up to act like barbed wire. I think I usually buy 5 or 7, which makes a 6 sided or 8 sided pen. Used this technique out in Ozona that has wild cattle & horses ... keeps them out for 2 years now.
"everyone that lives dies but not everyone who dies lived..."