diff --git a/python/lib/sift_client/_internal/grpc_transport/transport.py b/python/lib/sift_client/_internal/grpc_transport/transport.py
index f982be61c4..11d67e9e95 100644
--- a/python/lib/sift_client/_internal/grpc_transport/transport.py
+++ b/python/lib/sift_client/_internal/grpc_transport/transport.py
@@ -168,7 +168,14 @@ def _compute_channel_options(opts: SiftChannelConfig) -> list[tuple[str, Any]]:
         # Primary cannot be overriden:
         #  https://github.com/grpc/grpc/blob/0498194240f55d7f4b12633ad01339fb690621bf/src/core/ext/filters/http/client/http_client_filter.cc#L97
         ("grpc.secondary_user_agent", _compute_user_agent()),
-        ("grpc.max_receive_message_length", MAX_DECODING_MESSAGE_SIZE),
+        (
+            "grpc.max_receive_message_length",
+            opts.get("max_receive_message_length", MAX_DECODING_MESSAGE_SIZE),
+        ),
+        (
+            "grpc.max_send_message_length",
+            opts.get("max_send_message_length", MAX_DECODING_MESSAGE_SIZE),
+        ),
     ]
 
     enable_keepalive = opts.get("enable_keepalive", True)
@@ -251,3 +258,5 @@ class SiftChannelConfig(TypedDict):
     use_ssl: NotRequired[bool]
     cert_via_openssl: NotRequired[bool]
     request_timeout: NotRequired[float | None]
+    max_receive_message_length: NotRequired[int]
+    max_send_message_length: NotRequired[int]
diff --git a/python/lib/sift_client/_internal/low_level_wrappers/data.py b/python/lib/sift_client/_internal/low_level_wrappers/data.py
index 5a2dd522f6..6661a710cb 100644
--- a/python/lib/sift_client/_internal/low_level_wrappers/data.py
+++ b/python/lib/sift_client/_internal/low_level_wrappers/data.py
@@ -30,7 +30,7 @@
 # Configure logging
 logger = logging.getLogger(__name__)
 
-CHANNELS_DEFAULT_PAGE_SIZE = 10_000
+CHANNELS_DEFAULT_PAGE_SIZE = 100_000
 # TODO: There is a pagination issue API side when requesting multiple channels in single request.
 # If all data points for all channels in a single request don't fit into a single page, then
 # paging seems to omit all but a single channel. We can increase this batch size once that issue
diff --git a/python/lib/sift_client/_tests/_internal/test_transport.py b/python/lib/sift_client/_tests/_internal/test_transport.py
index 9d05289c5b..0cac17a87c 100644
--- a/python/lib/sift_client/_tests/_internal/test_transport.py
+++ b/python/lib/sift_client/_tests/_internal/test_transport.py
@@ -5,10 +5,9 @@
 import pytest
 
 from sift_client._internal.grpc_transport.transport import (
-    MAX_DECODING_MESSAGE_SIZE,
     _compute_channel_options,
 )
-from sift_client.transport.grpc_transport import GrpcClient, GrpcConfig
+from sift_client.transport.grpc_transport import MAX_DECODING_MESSAGE_SIZE, GrpcClient, GrpcConfig
 from sift_client.transport.rest_transport import DEFAULT_REST_TIMEOUT, RestClient, RestConfig
 
 
diff --git a/python/lib/sift_client/transport/grpc_transport.py b/python/lib/sift_client/transport/grpc_transport.py
index 07a64b905e..738ba40c36 100644
--- a/python/lib/sift_client/transport/grpc_transport.py
+++ b/python/lib/sift_client/transport/grpc_transport.py
@@ -20,6 +20,9 @@
     use_sift_async_channel,
 )
 
+MAX_DECODING_MESSAGE_SIZE = 50 * 1024 * 1024
+"""Largest gRPC message the client will accept or send, in bytes (50 MiB)."""
+
 # Configure logging
 logger = logging.getLogger(__name__)
 
@@ -48,6 +51,8 @@ def __init__(
         cert_via_openssl: bool = False,
         metadata: dict[str, str] | None = None,
         request_timeout: float | None = DEFAULT_REQUEST_TIMEOUT_SECONDS,
+        max_receive_message_length: int = MAX_DECODING_MESSAGE_SIZE,
+        max_send_message_length: int = MAX_DECODING_MESSAGE_SIZE,
     ):
         """Initialize the gRPC configuration.
 
@@ -60,6 +65,10 @@ def __init__(
             metadata: Additional metadata to include in all requests.
             request_timeout: Default deadline in seconds applied to unary RPCs that don't set
                 their own. Defaults to 60s. Set to None to disable the default deadline.
+            max_receive_message_length: Maximum gRPC message size the client will accept (bytes).
+                Defaults to `MAX_DECODING_MESSAGE_SIZE`.
+            max_send_message_length: Maximum gRPC message size the client will send (bytes).
+                Defaults to `MAX_DECODING_MESSAGE_SIZE`.
         """
         parsed_url = urlparse(url)
         normalized_url = url
@@ -77,6 +86,8 @@ def __init__(
         self.cert_via_openssl = cert_via_openssl
         self.metadata = metadata or {}
         self.request_timeout = request_timeout
+        self.max_receive_message_length = max_receive_message_length
+        self.max_send_message_length = max_send_message_length
 
     def _to_sift_channel_config(self) -> SiftChannelConfig:
         """Convert to a SiftChannelConfig.
@@ -90,6 +101,8 @@ def _to_sift_channel_config(self) -> SiftChannelConfig:
             "use_ssl": self.use_ssl,
             "cert_via_openssl": self.cert_via_openssl,
             "request_timeout": self.request_timeout,
+            "max_receive_message_length": self.max_receive_message_length,
+            "max_send_message_length": self.max_send_message_length,
         }