No one has to engage in an endless, pedantic exercise to tortuously interpret the generic words of witnesses to reconstruct the bag. That is rabbit hole nonsense with no exit ramp. This is simple. The bag exists. It was found. It has Oswald's prints on it. It was measured to determine its exact size. There is no reason to speculate.
Exactly Richard.
Besides the Mountain of physical evidence let's look at Oswald's actions and/or lies.
1) Oswald asks Frazier to take him to Irving to get "curtain rods".
So automatically I knew it wasn't Friday, I come to think it wasn't Friday and I said, "Why are you going home today?"
And he says, "I am going home to get some curtain rods." He said, "You know, put in an apartment."
He wanted to hang up some curtains and I said, "Very well."https://www.jfk-assassination.net/russ/testimony/frazierb1.htm2) Oswald breaks his usual routine and goes to Irving on a Thursday which just happens to be the day before the Presidential visit, what a coincidence!
3) Oswald goes against standard protocol and doesn't get permission from Ruth Paine for his unexpected visit.
4) Oswald leaves most of his money.
5) Oswald leaves his wedding ring.
6) Oswald never tells Marina he's going to leave with "curtain rods".
7) Oswald never tells Ruth that he's going to leave with "curtain rods".
8} Oswald upon reaching Frazier's house immediately hides the "curtain rods" in Frazier's car.
9) Oswald's package is seen by Frazier on the back seat of Frazier's car and Oswald confirms that it contains "curtain rods", whereas the interrogators recall that Oswald said he carried the package on his lap in the front seat.
10) Oswald is 50 feet ahead of Frazier when entering the Texas School Book Depository, another first.
11) Oswald leaves the Depository not at the start or end of lunch but after about 3 minutes from when the President is assassinated, roughly the time it takes to walk from the 6th floor, be confronted, buy a coke and then exit on the ground floor.
12) Oswald never asks permission to leave work by his immediate superior Shelley, in fact Shelley testifies that he never sees Oswald after 12PM.
13) Oswald made a great effort to get "curtain rods" yet isn't seen by Bledsoe on the bus carrying "curtain rods"
14) Oswald isn't seen in Whaley's cab carrying "curtain rods"
15) Oswald isn't seen by Roberts carrying "curtain rods" into his room at the rooming house.
16) Oswald's room doesn't contain any additional "curtain rods".
17) Oswald's room doesn't even need additional "curtain rods".
18) Oswald was not described by any eyewitnesses at the Tippit crime scene carrying "curtain rods"
19) Oswald was not described by Johnny Brewer as carrying "curtain rods"
20) Oswald didn't hit Officer McDonald over the head in the Texas Theatre with "curtain rods"
21) Oswald told his interrogators a different story that he never had "curtain rods" and only carried his lunch to work.
22) Oswald's prints were found on a brown paper bag recovered in the sniper's nest.
23) Oswald's rifle was a neat fit for the brown paper bag.
24) Oswald's "curtain rods" were never found in the Depository.

JohnM