While Rosco will manufacturer gobos in virtually any size needed for a particular luminaire, only certain sizes are considered standard and therefore readily and easily available.

The sizes indicated in the following table are availble in standard steel gobo designs, as well as custom and standard glass Spectrumgobos. Many liminaires, fixed and automated, require sizes others than those listed. Check our more complete list of fixtures and their corresponding gobos sizesto determine if Rosco can make the gobo you require.
Standard Gobo Sizes (Letter Sizes)
Letter Size
OD
IA
Comments
C size
150
120
 C Size available size by special order.
A Size 100
75
B Size
86
64.5
BG Size
79
64.5
 Obsolete glass size. Available by special order.
M Size
66
48
G Size
65.5
48
 For Clay Paky Goldenscans
D Size
53.3
38
Cyberlight
44.25
38
E Size
37.5
28
Studio Spot 575 36.3 31 For HES Studio Spot 575
Mac 500/918
27.5
22
 Not all standard designs available in this size.
V Size
25.5
22
 Not all standard designs available in this size.
Mac 250
22.5
17
 Not all standard designs available in this size.
518 Size
20
13
 Not all standard designs available in this size.
Sizes listed in millimeters. Not all designs are available in all sizes. Check with Rosco concerning a specific design in a specific size.