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Rule

Chart for converting old letter line sizes to AFTMA line sizes

Level Lines

 

Double Tapers

 

Weight Forward Tapers
Old Size AFTMA Code Old Size AFTMA Code Old Size AFTMA Code

G

L3F

HEH

DT5F

HDF

WF5F

F

L4F

HDH

DT6F

 

WF6F

E

L5F

 

DT7F

HCF

WF7F

D

L6F

HCH

DT8F

GBF

WF8F

 

L7F

GBG

DT9F

GAF

WF9F

C

L8F

 

 

GAAF

WF10F

B

L9F

 

 

 

 

Source: Cortland Company

Rule

I found this very helpful for finding out the line weight on silk fly lines.

 

AFTMA

DT

WF

 

 
 

#1

--

--

I     =    0.56mm/0.022"

  
 

#2

--

--

H    =    0.63mm/0.025"

  
 

#3

IFI

IFG

G    =    0.76mm/0.030”

  
 

#4

HFH

HFG

F    =    0.89mm/0.035"

  
 

#5

HEH

HEG

E    =    1.02mm/0.040"

  
 

#6

HDH

HDG

D    =    1.14mm/0.045"

  
 

#7

HCH

HCF

C    =    1.27mm"/0.050"

  
 

#8

GBG

GBF

B    =    1.40mm/0.055"

  
 

#9

GAG

GAF

A    =    1.52mm/0.060"

  
 

#10

G2AG

G2AF

2A  =    1.65mm/0.066"

  
 

#11

G3AG

G3AF

3A  =    1.78mm/0.070"

  
 

#12

        

Rule

 

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