Size of earring post?

[kalmen22]

Hi all, I'm looking to purchase some earring stud posts with peg and cup.
For a 9mm- 11mm stud what mm cup is suitable? 3mm or 4mm?
Is there some sort of chart to follow or how does one know what size is suitable?
Thank you in advance for your help!

 

[lilliefuzzysocks]

All mine have 6mm cups.

 

[JerseyPearl]

I would use a larger cup on a larger pearl. For an 11 mm I would use at least a 6 mm cup. 3 or 4 mm will be too small and might not actually fit the round shape of the pearl nice and tight.

 

[kalmen22]

Thank you for the response. OK. I'll do that. That was very helpful. I was staring at the cup size trying to figure. What would work.
And another silly question... I was trying to buy the ear nuts to match, I was on Rio and I couldn't seem to find the information on whether certain ear nut fit certain stud posts. There was information on the whole of the ear nut, but I couldn't find stats of the thickness of the ear post.
Appreciate any help. Thank you

 

[Lady_Disdain]

It is in the description. For example,

https://www.riogrande.com/Product/14k-yellow-gold-post-earring-with-cup-and-peg/640432

Shipping weight: 0.113 g (0.004ounces)
Metal type: Gold
Metal color: Yellow
Karat/purity: 14K
Cup size: 3.0mm
Post/wire size: .026" x 3/8"
Country of origin: United States

Sometimes, you will see both peg and post diameter. For example,

https://www.riogrande.com/Product/14k-yellow-gold-post-earring-mounting-with-3mm-cup-and-peg/628847

Shipping weight: 0.148 g (0.005ounces)
Metal type: Gold
Metal color: Yellow
Karat/purity: 14K
Cup size: 3.0mm
Post/wire size: .026" x 3/8"
Peg size: .026"
Dimensions: 11.1 x 4.6mm
Ring(s) ID: 1.2mm
Country of origin: United States

 

[kalmen22]

Lady D , so I look for ear nut that would fit the post size of 0.026"?

 

[GemGeek]

I have 10mm giant clutch backs in silver and gold filled. Those work pretty well at keeping big earrings up against my ear.

 

[Katbran]

Excellent advice from everyone..I'd definitely agree and suggest the 3-4mm only for little weeny pearls. I think most people would use from 6mm up.