What slick posted is similar to gates you often see in Scotland - the law there is 'right to roam' and such gates are *essential* because strangers would otherwise walk to the nearest proper gate, open it and forget to close it. Often they have a pair of wooden gates that fall shut by gravity when the person has passed through.
The gap I put in is 12 inches - I measured it for y'all the other day. Yep, calves get through it, so do I without any climbing, side stepping or twisting or walking another hundred metres to an actual gate. I'm not sure if I decided beforehand to install it (I think I did) but I know when I dug the post-hole I discovered there was going to be a gap anyway because it's next to a concrete yard and I couldn't dig any closer to the concrete than that.
Walking round the farm here is a matter of rolling under the fences, such things keep a person fit. Sure do wish there were a few stiles and bridges in key places. Tall people look at high tensile electric fences and step over them, but if I can do that so can one of my cows.
