(Closed) Ring Sizing = Rocket Science?

posted 8 years ago in Rings
Post # 3
670 posts
Busy bee
  • Wedding: May 2013

Thick band sizer will tell you your fingers are bigger than they really are


Post # 4
593 posts
Busy bee
  • Wedding: March 2013

you are not crazy. My engagement ring is 1 mm thick in a size 6.5 (probably should actually be a 6.25), and when I am without my engagment ring for any reason I wear a plain metal 3mm thick band. It is in a size 7 and fits perfectly.



1mm = size 6.25

3 mm = 7


I recommend going to a store to try on actual rings with the band thickness you want and seeing how the sizing feels.

Post # 5
4474 posts
Honey bee
  • Wedding: November 2012

If you have a ring that fits you comfortably and you’re not 100% sure of the size, take it to the jeweler and they’ll give you an accurate size.  Since you said this ring is a bit snug, go up a quarter or half size.  Also remember that the ering will be a tad smaller on you when you when you add a wedding band, so you may want to go up a quarter or half size.  Keep in mind as well that fingers get smaller when its cold and get larger in heat and if you tend to retain water. 


I can wear a 5.5 comfortably but if my fingers swell it gets uncomfortable.  A 6 is perfect in heat but will be loose in cold.  I ended up going with a 6 anyways.


Post # 6
561 posts
Busy bee
  • Wedding: October 1993

My jeweler has thin and thick ring sizers because the thickness of the band will make a difference in what size you need.  

Post # 7
674 posts
Busy bee
  • Wedding: February 2013

@EmmyGirl:  A thicker band ring will need to be a bigger size than a thinner one (think about it, your compressing around something that has nowhere else to go)

Post # 9
1237 posts
Bumble bee
  • Wedding: May 2015

This happened to me! I was sized in a shop as a 4.5 but the .85 mm band on my engagement ring was way too big (got sized down to a 4 and is still a little loose). I can’t believe the jeweler didn’t mention this to me when I was clearly shopping for thin bands! I would recommend trying to be sized with a thin band but unfortunately a lot of jewelers do not carry such small sizes in stock.

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