The inside dimensions are 4 3/8" x 4 5/8"x 5 3/8" tall. Box walls are 1/4" thick , box does not have a bottom. The cover fits as a sleeve over the top of the cardboard tissue box the opening fits nicely with the oval shape of the box.

Both Kleenex and Puff brand will fit the cube size
ebony regular sizetissue box cover for Puff tissues
 The inside dimensions are 4 3/4" x 9 1/2"x 4 1/4" tall. Box walls are 1/4" thick , box does not have a bottom. The cover fits as a sleeve over the top of the cardboard tissue box the opening fits nicely with the oval shape of the box.

Puff regular size 132 count box use front opening and folded tissues.
Puff family size tissuesbloodwood tissue box cover for family size Puff tissues
 The inside dimensions are 4 3/4" x 9 1/2"x 5 1/4" tall. Box walls are 1/4" thick , box does not have a bottom. The cover fits as a sleeve over the top of the cardboard tissue box the opening fits nicely with the oval shape of the box.

Puff family size 216 count box use front opening and folded tissue
Kleenex regular size tissuesBirds eye maple tissue box cover for Kleenex regular size tissue
 The inside dimensions are 4 3/4" x 9 1/2"x 4 1/4" tall. Box walls are 1/4" thick , box does not have a bottom. The cover fits as a sleeve over the top of the cardboard tissue box the opening fits nicely with the oval shape of the box.
Kleenex regular 184 count box has a top opening
Anigre tissue box cover for family size Kleenex tissues
 The inside dimensions are 4 3/4" x 9 1/2"x 5 1/4" tall. Box walls are 1/4" thick , box does not have a bottom. The cover fits as a sleeve over the top of the cardboard tissue box the oval shaped opening fits nicely with the opening in the box.
Kleenex family 230 count box has top opening
The inside dimensions are 4 3/4" x 9 1/2"x 2 7/8" tall. Box walls are 1/4" thick , box does not have a bottom. The cover fits as a sleeve over the top of the cardboard tissue box the oval shaped opening fits nicely with the opening in the box.

Kleenex Junior