but they are recorded as exceptional, I was initially thinking of something loosely spherical, in that case it is more probably something less than 20 mm or 4/5 of an inch in size/diameter that can be ingested, bar the exceptional cases.
But all these recorded items seem like having needed to be removed, I couldn't find anything about something (say) 100 mm long that managed to "pass through" naturally.
https://muttermuseum.org/exhibitions/chevalier-jackson-colle...
that has many interesting items, including spoons and keys, that are about that size.
I could only find a picture of some of these on a Lancet article:
https://www.thelancet.com/journals/lancet/article/PIIS0140-6...
There are reports of even bigger/longer objects, such as a tootbrush (8 inch/20 cm long):
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3080583/
but they are recorded as exceptional, I was initially thinking of something loosely spherical, in that case it is more probably something less than 20 mm or 4/5 of an inch in size/diameter that can be ingested, bar the exceptional cases.
But all these recorded items seem like having needed to be removed, I couldn't find anything about something (say) 100 mm long that managed to "pass through" naturally.