Use the following calculations when determining the collection extent in linear feet:
|1 SB||1 linear foot|
|1 MB||0.5 linear feet|
|½* MB||0.25 linear feet|
|1 TF||2 linear feet|
|1-5 scrapbooks||2 linear feet; continue for amounts larger than 5 scrapbooks (e.g., 23 scrapbooks = 10 linear feet, 3|
|1 package||1 linear foot|
|1 object||2 linear feet|
|1 newspaper||1 linear foot|
|1 folder||0.25 linear feet|
|1 envelope||0.25 linear feet|
|1-5 film reel(s)/can(s)||1 linear foot|
|1-5 magnetic tape reels||1 linear foot|
|OS Folder, OS print box, or poster(s)||3 linear feet|
Use the following formatting when listing multiple types of extent values:
- # linear feet (# containers or items), # items. # recordings and/or transcripts
- # bytes (# files). Specific file types
½ MBs are distinguished from MBs for extent calculation purposes ONLY. When writing extent statements, list and count ½ MBs as regular MBs.
- Collection A has 5 ½ MBs. Extent statement: 1.25 linear feet, 5 MBs.
- Collection B has 2 MBs and 3 ½ MBs. Extent statement: 1.25 linear feet, 5 MBs.