Safe-T Meter Stick and Inch Ruler

This hollow white plastic instrument has paper scales. One side has a 39-inch ruler, divided to 1/8" along the top and to 1/2" along the bottom. Alternate pairs of half-inches are colored orange on the bottom scale. The interior of this side has a recycling symbol around the number 7. The rule is marked: P.O. BOX 692 La Grange, IL 60525 SAFE-T RULERTM.
The other side is a meter stick, divided along the top to millimeters and along the bottom to centimeters. Alternate centimeters are colored blue on the bottom scale. The rule is marked: SAFE-TTM METER STICK. According to the donor, this meter stick is designed so that the straight edge is at some distance from the chalk or dry erase board.
Safe-T Products, Inc., was established in the northwest Chicago suburbs in 1992 to manufacture and sell drawing instruments that were safe for children. Thus, the plastic of this instrument is shatter-resistant. It sold for $12.95 in 2000. For company history, see 2000.0160.04.
References: Safe-T/Basics by Extra Measures, Inc., about 2000; accession file.
Currently not on view
Object Name
scale rule
date made
Extra Measures, Inc.
Safe-T Products, Inc.
Physical Description
paper (overall material)
plastic (overall material)
overall: 1.8 cm x 100 cm x 6.7 cm; 23/32 in x 39 3/8 in x 2 5/8 in
place made
United States: Illinois, La Grange
associated place
United States: Illinois, Bensenville
ID Number
accession number
catalog number
Measuring & Mapping
Scale Rules
Science & Mathematics
Rule, Measuring
Metric System
See more items in
Medicine and Science: Mathematics
Scale Rules
Metric System
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Extra Measures, Inc.
Additional Media

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