This Envelope Gatefold Flip Folio in black is part of the Foundations Collection from 49 and Market. This folio is an interactive folio that can be used alone or added to Foundations albums and binders. There are 10 die cut pieces and four large Neodymium magnets (15 mm) included in this package. This folio when folded on the score lines measures 6.25" x 8.25" x 0.5". The various pieces can be scored to mix and match various configurations of pages. These pieces can be used to create mini albums. This envelope can be used in a vertical or horizontal layout. There are additional spine hinges included to create page turns in both directions if needed. There is a warning included on the package from the manufacturer: Use with extreme care. Neodymium magnets are strong, brittle magnets that need to be handled with care to avoid injury. Keep away from children, adult use only. Strong magnets may be harmful to pacemakers. This envelope is acid free.