The reverse glass paintings are both 13x16..the pen and ink is 11x8
Thank you for your appraisal inquiry with Mearto. I very much apologize for the few hours delay on your appraisal. The objects presented appear to be a color lithographic print after a watercolor painting by Robert Frederick Blum (Ohio, 1857 - 1903) titled "Portrait of a Japanese Woman" and a set of depictions of East Asian ladies. As noted in the description, the set is reverse glass painting. However, I cannot confirm based on the images provided. I do notice a signature to one of the works, but cannot see it clearly in the photo. If you can upload a closer detail of the signature, I may be able to identify the writing.
A fair market value estimation for this collection including a lithograph after Robert Blum and two reverse glass paintings by an unknown artist would reach $100 - 500. The estimate provided is based on recent auction estimates and results of comparable objects and exact examples of the items within this collection. Please note that asking or retail prices may vary and the estimate is contingent on the objects' authenticity. Thank you and please take care.