I used to have a couple of pairs like this, with 4 "feet" around a 4 x 4 post with holes for the jump cups~ Lorien Stable - How to Build Jump Standards
I am looking forward to the post promised above--those horsey shaped sides are great looking!
I also recycled my two 8 in diameter clothesline poles and use them for poles on the ground. I painted them white, then painted black stripes on them before I sawed them off--they were set in cement, you see. My neighbors must have really wondered what these "barber poles" were going to be in my back yard!
There are some plastic jump blocks you can buy. I like them along with regular standards, because they are easy to use as cavalettis or as small jumps or the front pole of an oxer. You can also stack them to make higher jumps.
Corporal, thanks for posting that Lorien Stable page. That is a good design for basic standards.
HorseyyGal, your grandfather did a great job on those jumps!
Thanks for the positive comments on my standards.
And anyone who is drilling holes in a 4x4 should have a sample jump cup (of those that they will be using with the standards) to use to help check the marks where you are going to drill the holes. Different designs of jump cups can have holes in different places on the flanges, and they might not fit if the holes are drilled right down the middle of the 4x4. I usually offset the drilled holes a little bit toward where the rail/pole side is of the 4x4.