Usage examples for 4

1. Capillitium of slender threads, 3. 5- 4 mic.  The Myxomycetes of the Miami Valley, Ohio by A. P. Morgan

2. 4. Further, just as the Saints after death see the Word, so also do the Angels, for of them it is said: Their Angels in Heaven always see the face of My Father Who is in Heaven.  On Prayer and The Contemplative Life by St. Thomas Aquinas

3. Once they were within 2 to 4 mm.  Natural History of the Salamander, Aneides hardii by Richard F. Johnston Gerhard A. Schad