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MPLS MTU size

If i want to carry l2vpn packets accross my backbone (with QinQ) and the IP MTU should be at a maximum of 1500 what is my MPLS MTU (Juniper routers) Is it correct if i say that my MPLS MTU should be 1534, im really confused about this how my ingress interface will handle these requests in conjuntion with the l2vpn header...

IP MTU 1500 (including 20 byte IP Header + 20 byte TCP Header)

Ethernet MTU 1526 (1500 + 18 + 4 (vlan) + 4 (vlan))

MPLS MTU 1534 (1526 + 4 (label) + 4(label)

Looking forward to your answers!

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