Tray is 7.25 inches wide and has afrosted bottom with 70 in the center.
Fenton made one that looks very much like this but it is unlikely that it would have that mark in the middle.
Update 1-15-23 - This piece with the 70 has been identified as being made for Doris Lechler (Lechler's Heirlooms of Tomorrow) by Fenton. The piece with the 70 was used with a Children's Miniature Lemonade Set, but has also been used with later Fenton Dresser sets. Thanks to Julie Merrill for the information.
Reference: Some information about this collection is on pages 76 and 77 of Fenton Glass The 1980s Decade by James Measell. Additionally, this set is shown on page 45 of Fenton Special Orders 1980-Present by John Walk.