Silver Clay Ring Size Conversion Chart
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1ART CLAY RING MAKING
As Art Clay shrinks when fired, you need to make rings slightly larger than wanted. Art Clay shrinks
by volume - this means that a thicker and larger piece will shrink more than a small thin piece, as it
contains more clay.
A - For a ring shank up to 3mm thick, make the
ring 2 to 3* sizes larger.
B - For a flat and wide ring shank (up to 1.5mm
thick and 10mm wide), make the ring 3 to 4*
sizes larger.
C- If wider or thicker than A and B, make it 4 to
5* sizes larger. For instance, a ring shank 4mm
wide and 1.5mm thick, which added syringe
decorations or cut-out shapes of clay.
*this refers to Japanese ring sizes. For UK and US sizes, see the ring size con-
version chart to convert to the correct size you need.
Wrap wooden mandrels with ring-sizing paper, a post-it or Teflon sheet where you’re making the
ring, to stop it from sticking. When the ring starts drying, ease it up slightly on the mandrel to allow
for the slight shrinkage whilst drying.
When dry, remove the paper from the ring by wrapping it around itself, starting from the inside.
Don’t pull it off the ring as this can break a delicate ring. If it’s sticky, leave to dry a bit more.
RING SIZE CONVERSION CHART
Diameter
UK
JAPAN
US
in mm
C
1
1
13
D
2
2
13
1/3
E
3
2 . 5
13
2/3
F
4
3
14
G
5
3 . 5
14
1/3
G - H
6
3 . 5 - 4
14
2/3
H - I
7
4 - 4 . 5
15
I - J
8
4 . 5 - 5
15
1/3
J
9
5
15
2/3
Build rings on paper to stop them
Support dry rings on a rubber block
K
10
5 . 5
16
sticking to the mandrel
when sanding, filing and shaping
L
11
6
16
1/3
L - M
12
6 . 5
16
2/3
M - N
13
6 . 5 - 7
17
N - O
14
7 - 7 . 5
17
1/3
O-P
15
7.5-8
17
2/3
P
16
8
18
Q
17
8.5
18
1/3
R
18
9
18
2/3
S
19
9.5
19
T
20
10
19
1/3
T-U
21
10-10.5
19
2/3
U
22
10.5
20
V
23
11
20
1/3
W
24
11.5
20
2/3
X
25
12
21
Y
26
12.5
21
1/3
Z
27
13
21
2/3
EVERYTHING YOU NEED FOR METAL CLAY
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