# Final library trace examples for the Illumina Library Prep Kits
When preparing Illumina sequencing libraries, we recommend performing quality control analysis on the final library using the Agilent Bioanalyzer, Fragment Analyzer, or similar instruments to assess the library size and profile. The following library sizes are guides, and profiles may vary slightly. For more information, see the appropriate library prep kit reference guide.
**Illumina DNA Library Prep Kits**
**Nextera DNA Library Prep Kits**
**TruSeq DNA Library Prep Kits**
**Illumina RNA Library Prep Kits**
**TruSeq RNA Library Prep Kits**
**TruSight Library Prep Kits**
**AmpliSeq for Illumina Library Prep Kits**
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| *For any feedback or questions regarding this article (Illumina Knowledge Article #6037), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000006037%20-%20Library%20Preparation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |
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