Four leaves, four shapes
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The group has four leaves
Bead embroidery, embroidery needle, floss storage and hoop hardware. All four are components or tools rather than finished textile products.
Beads are the only one that behaves like a volume
Seed beads pour and settle, so a capacity figure means something for them, and a narrow mouth is the enemy because beads have to come out as well as go in.
Needles are a length problem
An embroidery or crewel needle runs roughly one and a half to two and a half inches. A beading needle can reach three. Whether that stands upright in a jar is a question about interior depth and nothing else.
Floss is a length and a tangle problem at once
A skein is about eight meters wound flat. Loose skeins in a deep jar interlock and have to be lifted out as a mass, which is why a shallow wide container usually beats a tall narrow one for floss.
Hoop hardware is a flat parts problem
The screw, the wing nut, the bracket and the tension band are flat or short. They need a floor they can be spread across rather than a column they stack in.
So two leaves want flat and two want depth
Floss and hoop hardware want a wide shallow footprint. Needles want height. Beads want a wide mouth and will take either, which makes the group a shape question rather than a size question.
Which a capacity in milliliters cannot answer
Two containers at 237 mL on this shelf can measure 1.5 by 4.5 inches and roughly 4 by 2.75. The same volume, two different answers for a two and a half inch needle.
And the catalog records the dimensions that decide it
237 of 251 containers record a height and 220 record a diameter, which is enough to answer the shape question for most of the shelf even though 32 rows cannot be ranked by ratio at all.
With one caveat that the containers pages repeat
These are outside dimensions. A 2.5 inch outside height is less than 2.5 inches of interior depth, and the difference is the base thickness plus whatever the lid occupies.
None of the four is subject to the rule above
Part 303 governs the fiber content statement on a finished textile fiber product. A needle is not a fiber product at all, and a skein of floss on a shelf is not the article a content statement describes.